Add parameter to control data provider flush interval
Modify shards' name to 5 width string
Merge pull request #9 from shixin86/sort-shards

Modify shards' name in hadoop to 5 width string
Use new comparator for shard name sorting

Conflicts:

	sensei-hadoop-indexing/src/main/java/com/senseidb/indexing/hadoop/job/MapReduceJob.java