HBASE-8842 TestTokenAuthentication failing on hadoop2 build with "IllegalArgumentException: Can t get Kerberos realm"

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1499134 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8854 TestScannersFromClientSide.testScanBatch failed with 'There should have room before prefetching is submitted'

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1499136 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8798 Fix a minor bug in shell command with clone_snapshot table error



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1499138 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-666-trunk-gd