Tag actions integrations tests (#114)

* feat: Added an integration test case for for tag actions(get, put, delete)

cmd/versitygw/test.go

@@ -157,6 +157,14 @@ func initTestCommands() []*cli.Command {
 			removes both the object and bucket`,
 			Action: getAction(integration.TestInvalidMultiParts),
 		},
+		{
+			Name:  "object-tag-actions",
+			Usage: "Tests get/put/delete object tag actions.",
+			Description: `Creates a bucket with s3 gateway action, puts an object in it,
+			puts some tags for the object, gets the tags, compares the results, removes the tags,
+			gets the tags again, checks it to be empty, then removes both the object and bucket`,
+			Action: getAction(integration.TestPutGetRemoveTags),
+		},
 		{
 			Name:        "full-flow",
 			Usage:       "Tests the full flow of gateway.",