Allow bucket creation in different regions, closes minio#4287 and min…

…io#4241

* I needed to remove the region check from PutBucketHandler

cmd/gateway-gcs.go

@@ -229,11 +229,6 @@ func (l *gcsGateway) MakeBucket(bucket string) error {
 func (l *gcsGateway) MakeBucketWithLocation(bucket, location string) error {
 	bkt := l.client.Bucket(bucket)
 
-	// we'll default to the us multi-region in case of us-east-1
-	if location == "us-east-1" {
-		location = "us"
-	}
-
 	if err := bkt.Create(l.ctx, l.projectID, &storage.BucketAttrs{
 		Location: location,
 	}); err != nil {

cmd/gateway-handlers.go

@@ -653,15 +653,6 @@ func (api gatewayAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Re
 		return
 	}
 
-	// validating region here, because isValidLocationConstraint
-	// reads body which has been read already. So only validating
-	// region here.
-	serverRegion := serverConfig.GetRegion()
-	if serverRegion != "" && serverRegion != location {
-		writeErrorResponse(w, ErrInvalidRegion, r.URL)
-		return
-	}
-
 	bucketLock := globalNSMutex.NewNSLock(bucket, "")
 	bucketLock.Lock()
 	defer bucketLock.Unlock()