vendorize minio-go to version 4.0.6

[poornas]

Fixes #2304
minio-go increases # of retries to 10 in 4.0.6 release. This might help with connection timeouts.

minio-go changes from 4.0.5 to 4.0.6 release

• Support redirect headers to sign again with new Host header. (Update sync session document" #829)
• Fail in PutObject if invalid user metadata is passed
• PutObjectOptions Header: Don't include invalid header
• increase max retry count to 10 (If hostconfig not found for 127.0.0.1 or localhost, auth/keys not needed #913)
• Fix contentType typo while logging in testFputObject (Rename cmd-* into <command>-main.go #912)
• Fixed misspelled mint mode env. var. (Update to new minio-go changes related to x-amz-id-2 #909)
• Add new regions for Paris and China west. (fix error strings #905)
• fix s3signer to use req.Host header (Sort sessions before printing #899)
• Update functional tests to not expect storage class (cleaner syntax checker #904)
• Fix PutObject docs for x-amz-storage-class (syntax checker for cast command #903)
• Add storage class support (Some gocoverage fixes #896)

[codecov-io]

Codecov Report

Merging #2357 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #2357      +/-   ##
==========================================
- Coverage   10.82%   10.82%   -0.01%     
==========================================
  Files         103      103              
  Lines        7676     7678       +2     
==========================================
  Hits          831      831              
- Misses       6711     6713       +2     
  Partials      134      134

Impacted Files	Coverage Δ
cmd/client-s3.go	13.32% <0%> (-0.03%)	⬇️

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[harshavardhana]

perhaps you can list out the changes from the previous update in a

git rel 8f3697672e0e9246e8ab65108f2b7b1294814294..4.0.6

style? from minio-go repository.

[harshavardhana]

why is your rootPath wrong? please fix.