Fixed the issue of batch ingestion with indexing service to hdfs end up with the path of metadata in mysql missing "hdfs://host" prefix. The detail describe can be found here: https://groups.google.com/forum/#!topic/druid-development/ofvSxiPpCxI
Merge pull request #760 from flowbehappy/fix-hadoop-index-path-prefix

Fixed the issue about the path's prefix after batch ingestion with indexing service to hdfs