Fix minimum replication workers started

[poornas]

Description

Motivation and Context

Replication should not fail to start workers even in a test setup with one cpu, though replication essentially needs its own thread

Also fixing permissions issue in web-handlers.go for checking if user has GetReplicationConfiguration permission.

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)
• 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 needed
• Unit tests needed

[eco-minio]

Single minor change

[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-gateway-nas.sh	✔️
mint-gateway-azure.sh	❌ more...
mint-zoned.sh	❌ more...

10560-1cc9083/mint-zoned.sh.log:

Running with
SERVER_ENDPOINT:      minio-dev4.minio.io:31609
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 b3f2f6f1a5e6:/mint/log /tmp/mint-logs'

(1/15) Running aws-sdk-go tests ... done in 3 seconds
(2/15) Running aws-sdk-java tests ... done in 2 seconds
(3/15) Running aws-sdk-php tests ... done in 45 seconds
(4/15) Running aws-sdk-ruby tests ... done in 6 seconds
(5/15) Running awscli tests ... done in 2 minutes and 11 seconds
(6/15) Running healthcheck tests ... done in 1 seconds
(7/15) Running mc tests ... done in 1 minutes and 14 seconds
(8/15) Running minio-dotnet tests ... done in 57 seconds
(9/15) Running minio-go tests ... done in 3 minutes and 4 seconds
(10/15) Running minio-java tests ... done in 1 minutes and 41 seconds
(11/15) Running minio-js tests ... done in 52 seconds
(12/15) Running minio-py tests ... done in 3 minutes and 40 seconds
(13/15) Running s3cmd tests ... FAILED in 23 seconds
{
  "name": "s3cmd",
  "duration": "11613",
  "function": "test_sync_list_objects",
  "status": "FAIL",
  "error": "WARNING: Bucket is not empty. Removing all the objects from it first. This may take some time...\nERROR: S3 error: 404 (Not Found)"
}
(13/15) Running s3select tests ... done in 10 seconds
(14/15) Running security tests ... done in 0 seconds

Executed 14 out of 15 tests successfully.

10560-1cc9083/mint-gateway-azure.sh.log:

Running with
SERVER_ENDPOINT:      minio-dev7.minio.io:32755
ACCESS_KEY:           minioazure
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 6f2a7b56ac77:/mint/log /tmp/mint-logs'

(1/15) Running aws-sdk-go tests ... done in 9 seconds
(2/15) Running aws-sdk-java tests ... done in 2 seconds
(3/15) Running aws-sdk-php tests ... done in 1 minutes and 5 seconds
(4/15) Running aws-sdk-ruby tests ... done in 19 seconds
(5/15) Running awscli tests ... done in 2 minutes and 51 seconds
(6/15) Running healthcheck tests ... done in 1 seconds
(7/15) Running mc tests ... done in 4 minutes and 2 seconds
(8/15) Running minio-dotnet tests ... done in 1 minutes and 37 seconds
(9/15) Running minio-go tests ... FAILED in 1 minutes and 53 seconds
{
  "args": {
    "bucketName": "minio-go-test-qmorn6nyxda5mw5p",
    "objectName": "test-object",
    "opts": "",
    "size": -1
  },
  "duration": 1075,
  "function": "PutObject(bucketName, objectName, reader,size,opts)",
  "message": "Unexpected size",
  "name": "minio-go: testPutObjectStreaming",
  "status": "FAIL"
}
(9/15) Running minio-java tests ... FAILED in 10 minutes and 58 seconds
{
  "name": "minio-java",
  "function": "removeIncompleteUpload(RemoveIncompleteUploadArgs args)",
  "duration": 875,
  "status": "FAIL",
  "error": "java.net.SocketException: Connection reset >>> [java.base/java.net.SocketInputStream.read(SocketInputStream.java:186), java.base/java.net.SocketInputStream.read(SocketInputStream.java:140), okio.Okio$2.read(Okio.java:140), okio.AsyncTimeout$2.read(AsyncTimeout.java:237), okio.RealBufferedSource.indexOf(RealBufferedSource.java:358), okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:230), okhttp3.internal.http1.Http1ExchangeCodec.readHeaderLine(Http1ExchangeCodec.java:242), okhttp3.internal.http1.Http1ExchangeCodec.readResponseHeaders(Http1ExchangeCodec.java:213), okhttp3.internal.connection.Exchange.readResponseHeaders(Exchange.java:115), okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:94), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142), okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:43), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117), okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:94), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117), okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142), okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:88), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142), okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117), okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:229), okhttp3.RealCall.execute(RealCall.java:81), io.minio.MinioClient.execute(MinioClient.java:1014), io.minio.MinioClient.uploadPart(MinioClient.java:7781), io.minio.MinioClient.putObject(MinioClient.java:4706), io.minio.MinioClient.putObject(MinioClient.java:4881), FunctionalTest.removeIncompleteUploads_test(FunctionalTest.java:1687), FunctionalTest.runTests(FunctionalTest.java:3820), FunctionalTest.main(FunctionalTest.java:4058)]"
}
(9/15) Running minio-js tests ... FAILED in 45 seconds
{
  "name": "minio-js",
  "function": "\"after all\" hook in \"functional tests\"",
  "duration": 79,
  "status": "FAIL",
  "error": "S3Error: The bucket you tried to delete is not empty at Object.parseError (node_modules/minio/dist/main/xml-parsers.js:86:11) at /mint/run/core/minio-js/node_modules/minio/dist/main/transformers.js:156:22 at DestroyableTransform._flush (node_modules/minio/dist/main/transformers.js:80:10) at DestroyableTransform.prefinish (node_modules/readable-stream/lib/_stream_transform.js:129:10) at prefinish (node_modules/readable-stream/lib/_stream_writable.js:611:14) at finishMaybe (node_modules/readable-stream/lib/_stream_writable.js:620:5) at endWritable (node_modules/readable-stream/lib/_stream_writable.js:643:3) at DestroyableTransform.Writable.end (node_modules/readable-stream/lib/_stream_writable.js:571:22) at IncomingMessage.onend (_stream_readable.js:682:10) at endReadableNT (_stream_readable.js:1252:12) at processTicksAndRejections (internal/process/task_queues.js:80:21)"
}
(9/15) Running minio-py tests ... done in 21 minutes and 39 seconds
(10/15) Running s3cmd tests ... done in 2 minutes and 33 seconds
(11/15) Running s3select tests ... done in 41 seconds
(12/15) Running security tests ... done in 0 seconds

Executed 12 out of 15 tests successfully.

Deleting image on docker hub
Deleting image locally
Error: No such image: minio/minio:10560-1cc9083