Cleanup output from maven during travis build by using quiet mode
Added changes as to make an abstraction layer between the HBaseClient. Now there is another client called HBaseStore that implements the interface TsdbStore, maybe work on the naming... This is just an initial commit as to break it out and see what needs to be done for making TSDB available for Cassandra.
Extract table verification functionality into net.opentsdb.storage.TsdbStore#checkNecessaryTablesExist
Pull out hbase implementation details from TSDB#addPointInternal
Reformat TsdbStore and HBaseStore
Extract flush into HBaseStore
Move compaction shutdown into HBaseStore
Reformat and extract stats into HBaseStore