support S3 compatible region (#453)

* support S3 compatible region

* wip

lib/record/utils.js

@@ -26,7 +26,7 @@ const getUploader = (key, metadata, bucket_credential, logger) => {
             accessKeyId: bucket_credential.access_key_id,
             secretAccessKey: bucket_credential.secret_access_key,
           },
-          region: 'us-east-1',
+          region: bucket_credential.region || 'us-east-1',
           forcePathStyle: true
         };
         return new S3MultipartUploadStream(logger, uploaderOpts);