tests: Add functional tests for bucket tagging

[vadmeste]

Add functional tests for bucket tagging, PUT/GET/DELETE.

[romanchechyotkin]

Hello, this task is 3 years old, but i can do it, wanna start my opensource adventure.
Is this still valid issue?

[klauspost]

@romanchechyotkin Good first topic indeed! I don't see it added to the repo.

It should be added to functional_tests.go. Add an entry. When I do it, I just add it at the top and add a temporary "return". To start out maybe copy an existing like testMakeBucketError and modify that.

I then run it against a local minio install with a simple script. You can adapt that to your needs:

SET ACCESS_KEY=minio
SET SECRET_KEY=minio123
SET SERVER_ENDPOINT=127.0.0.1:9001
SET MINT_DATA_DIR=
SET MINT_MODE=full
SET ENABLE_HTTPS=false
SET ENABLE_KMS=true

go build functional_tests.go && functional_tests

[romanchechyotkin]

#1986 here is my PR
free to criticism

[harshavardhana]

Task completed via #1986