HBASE-12265 HBase shell 'show_filters' points to internal Facebook URL
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)