Allow delete marker replication from replica

[poornas]

in the case of active-active replication.

This PR also has following changes:

• add docs on replication design
• fix corner case of completing versioned delete on a delete marker
  when target is down and mc rm --vid is performed repeatedly. Instead
  the version should still be retained in PENDING|FAILED state until
  replication sync completes.
• Remove s3:Replication:OperationCompletedReplication and
  s3:Replication:OperationFailedReplication from ObjectCreated events
  type

Description

Motivation and Context

In active-active replication, allowing delete marker replication from replica back to source is better as object state would be out of sync if this is not permitted.Added a note to documentation about limitation w.r.t duplicate delete markers if source and target both set delete markers concurrently

How to test this PR?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Documentation updated
• Unit tests added/updated

[harshavardhana]

@poornas tests need to be fixed

=== RUN   TestNameExpand
    name_test.go:45: test 4: result: expected: [s3:ObjectCreated:CompleteMultipartUpload s3:ObjectCreated:Copy s3:ObjectCreated:Post s3:ObjectCreated:Put s3:ObjectCreated:PutRetention s3:ObjectCreated:PutLegalHold s3:ObjectCreated:PutTagging s3:ObjectCreated:DeleteTagging s3:Replication:OperationCompletedReplication s3:Replication:OperationFailedReplication], got: [s3:ObjectCreated:CompleteMultipartUpload s3:ObjectCreated:Copy s3:ObjectCreated:Post s3:ObjectCreated:Put s3:ObjectCreated:PutRetention s3:ObjectCreated:PutLegalHold s3:ObjectCreated:PutTagging s3:ObjectCreated:DeleteTagging]

[minio-trusted]

Mint Automation

Test	Result
mint-large-bucket.sh	✔️
mint-fs.sh	✔️
mint-gateway-s3.sh	✔️
mint-erasure.sh	✔️
mint-dist-erasure.sh	✔️
mint-zoned.sh	✔️
mint-gateway-nas.sh	✔️
mint-compress-encrypt-dist-erasure.sh	❌ more...

11566-a064032/mint-compress-encrypt-dist-erasure.sh.log:

Running with
SERVER_ENDPOINT:      minio-dev8.minio.io:31501
ACCESS_KEY:           minio
SECRET_KEY:           ***REDACTED***
ENABLE_HTTPS:         0
SERVER_REGION:        us-east-1
MINT_DATA_DIR:        /mint/data
MINT_MODE:            full
ENABLE_VIRTUAL_STYLE: 0

To get logs, run 'docker cp 6e85809a0472:/mint/log /tmp/mint-logs'

(1/15) Running aws-sdk-go tests ... done in 1 seconds
(2/15) Running aws-sdk-java tests ... done in 2 seconds
(3/15) Running aws-sdk-php tests ... done in 43 seconds
(4/15) Running aws-sdk-ruby tests ... done in 4 seconds
(5/15) Running awscli tests ... FAILED in 33 seconds
{
  "name": "awscli",
  "duration": 2775,
  "function": "aws --endpoint-url http://minio-dev8.minio.io:31501 s3api copy-object --bucket awscli-mint-test-bucket-10006 --key datafile-1-kB-copy --copy-source awscli-mint-test-bucket-10006/datafile-1-kB\n",
  "status": "FAIL",
  "error": "Hash mismatch expected 084e1383b70fb0c51acc680fef370023, got ac57de7156d7fc25ac1a65f81fa3989b"
}
(5/15) Running healthcheck tests ... done in 0 seconds
(6/15) Running mc tests ... done in 54 seconds
(7/15) Running minio-dotnet tests ... done in 1 minutes and 1 seconds
(8/15) Running minio-go tests ... FAILED in 2 minutes and 29 seconds
{
  "args": {
    "destination": {
      "Bucket": "minio-go-test-bgtw0wr49vos3woq",
      "Object": "dstObject",
      "Encryption": {},
      "UserMetadata": null,
      "ReplaceMetadata": false,
      "UserTags": null,
      "ReplaceTags": false,
      "LegalHold": "",
      "Mode": "",
      "RetainUntilDate": "0001-01-01T00:00:00Z",
      "Size": 0,
      "Progress": null
    },
    "source": {
      "Bucket": "minio-go-test-bgtw0wr49vos3woq",
      "Object": "srcObject",
      "VersionID": "",
      "MatchETag": "",
      "NoMatchETag": "",
      "MatchModifiedSince": "0001-01-01T00:00:00Z",
      "MatchUnmodifiedSince": "0001-01-01T00:00:00Z",
      "MatchRange": false,
      "Start": 0,
      "End": 0,
      "Encryption": null
    }
  },
  "duration": 4181,
  "error": "We encountered an internal error, please try again.: cause(s2: corrupt input)",
  "function": "CopyObject(destination, source)",
  "message": "GetObject failed",
  "name": "minio-go: testUnencryptedToSSES3CopyObject",
  "status": "FAIL"
}
(8/15) Running minio-java tests ... FAILED in 1 minutes and 34 seconds
{
  "name": "minio-java",
  "function": "copyObject()",
  "args": "[match etag]",
  "duration": 222,
  "status": "FAIL",
  "error": "error occurred\nErrorResponse(code = PreconditionFailed, message = At least one of the pre-conditions you specified did not hold, bucketName = minio-java-test-3iqboaf, objectName = minio-java-test-qns0qd-copy, resource = /minio-java-test-3iqboaf/minio-java-test-qns0qd-copy, requestId = 1664C20CD5152866, hostId = 71925856-5701-4223-babf-869acc09295e)\nrequest={method=PUT, url=http://minio-dev8.minio.io:31501/minio-java-test-3iqboaf/minio-java-test-qns0qd-copy, headers=x-amz-copy-source-if-match: 71cff0a060f852067e443ad1e24ae26c-1\nx-amz-copy-source: /minio-java-test-38nfig6/minio-java-test-qns0qd\nHost: minio-dev8.minio.io:31501\nAccept-Encoding: identity\nUser-Agent: MinIO (Linux; amd64) minio-java/8.0.3\nContent-MD5: 1B2M2Y8AsgTpgAmY7PhCfg==\nx-amz-content-sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\nx-amz-date: 20210218T055846Z\nAuthorization: AWS4-HMAC-SHA256 Credential=*REDACTED*/20210218/us-east-1/s3/aws4_request, SignedHeaders=content-md5;host;x-amz-content-sha256;x-amz-copy-source;x-amz-copy-source-if-match;x-amz-date, Signature=*REDACTED*\n}\nresponse={code=412, headers=Accept-Ranges: bytes\nContent-Length: 416\nContent-Security-Policy: block-all-mixed-content\nContent-Type: application/xml\nETag: \"71cff0a060f852067e443ad1e24ae26c\"\nLast-Modified: Thu, 18 Feb 2021 05:58:46 GMT\nServer: MinIO\nVary: Origin\nX-Amz-Request-Id: 1664C20CD5152866\nX-Xss-Protection: 1; mode=block\nDate: Thu, 18 Feb 2021 05:58:46 GMT\n}\n >>> [io.minio.MinioClient.execute(MinioClient.java:775), io.minio.MinioClient.execute(MinioClient.java:563), io.minio.MinioClient.executePut(MinioClient.java:904), io.minio.MinioClient.copyObject(MinioClient.java:1232), FunctionalTest.testCopyObjectMatchETag(FunctionalTest.java:1850), FunctionalTest.copyObject(FunctionalTest.java:2016), FunctionalTest.runObjectTests(FunctionalTest.java:3757), FunctionalTest.runTests(FunctionalTest.java:3783), FunctionalTest.main(FunctionalTest.java:3927)]"
}
(8/15) Running minio-js tests ... done in 48 seconds
(9/15) Running minio-py tests ... done in 2 minutes and 59 seconds
(10/15) Running s3cmd tests ... FAILED in 5 seconds
{
  "name": "s3cmd",
  "duration": "3027",
  "function": "test_put_object_multipart",
  "status": "FAIL",
  "error": "WARNING: MD5 Sums don't match!\nWARNING: Retrying upload of /mint/data/datafile-65-MB\nWARNING: MD5 Sums don't match!\nWARNING: Retrying upload of /mint/data/datafile-65-MB\nWARNING: MD5 Sums don't match!\nWARNING: Retrying upload of /mint/data/datafile-65-MB\nWARNING: MD5 Sums don't match!\nWARNING: Retrying upload of /mint/data/datafile-65-MB\nWARNING: MD5 Sums don't match!\nWARNING: Retrying upload of /mint/data/datafile-65-MB\nWARNING: MD5 Sums don't match!\nWARNING: Too many failures. Giving up on '/mint/data/datafile-65-MB'\nERROR: \nUpload of '/mint/data/datafile-65-MB' part 1 failed. Use\n  /usr/local/bin/s3cmd abortmp s3://s3cmd-test-bucket-6593/s3cmd-test-object-18002 1cb96929-5697-4a16-baf0-682eaebd0124\nto abort the upload, or\n  /usr/local/bin/s3cmd --upload-id 1cb96929-5697-4a16-baf0-682eaebd0124 put ...\nto continue the upload.\nERROR: Upload of '/mint/data/datafile-65-MB' failed too many times (Last reason: )"
}
(10/15) Running s3select tests ... done in 7 seconds
(11/15) Running security tests ... done in 0 seconds

Executed 11 out of 15 tests successfully.

Deleting image on docker hub
Deleting image locally