HBASE-12241 The crash of regionServer when taking deadserver's replication queue breaks replication (Shaohui)
HBASE-12274 Race between RegionScannerImpl#nextInternal() and RegionScannerImpl#close() may produce null pointer exception
HBASE-12261 Add checkstyle to HBase build process
HBASE-12264 ImportTsv should fail fast if output is not specified and table does not exist (Ashish)
HBASE-12263 RegionServer listens on localhost in distributed cluster when DNS is unavailable (Shaohui)
HBASE-12229 NullPointerException in SnapshotTestingUtils

* Implemented the waitUntilAllRegionsOnline in HBaseTestingUtility#createTable
* Add waitFor around #isTableAvailable call that previously didn't do anything
* Remove unused byte[] hex

Signed-off-by: stack <stack@apache.org>
Add admin endpoint for updating the configuration on the regionserver

Summary: This is a follow up diff for the jira to add the functionality to update configs in an online fashion.

Test Plan: Unit test. This adds an end point on the regionserver. It just tries to call the end point and make sure the call succeeds.

Differential Revision: https://reviews.facebook.net/D24861

Signed-off-by: stack <stack@apache.org>
HBASE-12161 Add support for grant/revoke on namespaces in AccessControlClient (Srikanth Srungarapu)
HBASE-12192 Remove EventHandlerListener
HBASE-12278 Race condition in TestSecureLoadIncrementalHFilesSplitRecovery (Dima Spivak)
HBASE-12294 Fix site generation