XL/fs: DeleteVol should not return error cleaning multipart dir for errVolumeNotFound (#2188)

fs-v1.go

@@ -204,7 +204,7 @@ func (fs fsObjects) DeleteBucket(bucket string) error {
 		return toObjectErr(err, bucket)
 	}
 	// Cleanup all the previously incomplete multiparts.
-	if err := cleanupDir(fs.storage, path.Join(minioMetaBucket, mpartMetaPrefix), bucket); err != nil {
+	if err := cleanupDir(fs.storage, path.Join(minioMetaBucket, mpartMetaPrefix), bucket); err != nil && err != errVolumeNotFound {
 		return toObjectErr(err, bucket)
 	}
 	return nil

xl-v1-bucket.go

@@ -247,7 +247,7 @@ func (xl xlObjects) DeleteBucket(bucket string) error {
 			}
 			// Cleanup all the previously incomplete multiparts.
 			err = cleanupDir(disk, path.Join(minioMetaBucket, mpartMetaPrefix), bucket)
-			if err != nil {
+			if err != nil && err != errVolumeNotFound {
 				dErrs[index] = err
 			}
 		}(index, disk)