HBASE-9349. [0.92] NPE in HMaster during shutdown

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.92@1517752 13f79535-47bb-0310-9956-ffa450edef68
Prepare for 0.92.3 RC1
Add test.output.tofile parameter to POM
HBASE-9305. [0.92] TestFromClientSide.testCacheOnWriteEvictOnClose fails occasionally