Fixed checkstyle issues

Author: shweta-deosarkar

src/main/java/io/cdap/plugin/gcp/gcs/source/GCSSource.java

@@ -341,4 +341,4 @@ Map<String, String> getFileSystemProperties() {
       return GSON.fromJson(fileSystemProperties, MAP_STRING_STRING_TYPE);
     }
   }
-}
+}