HBASE-8367 LoadIncrementalHFiles does not return an error code nor throw Exception when failures occur due to timeouts (Brian Dougan)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1481989 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/0.95' into 0.95-gd
Merge remote branch 'origin/0.95-gd' into fb-YAHOO-312-0.95-gd