HBASE-8150 server should not produce RAITE for already-opening region in 0.94 (because master retry logic handles this case poorly)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1465063 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8260 create generic integration test for trunk and 94 that is more deterministic, can be run for longer and is less aggressive

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1465118 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8270 Backport HBASE-8097 'MetaServerShutdownHandler may potentially keep bumping up DeadServer.numProcessing' to 0.94 (Jeffrey Zhong)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1465120 13f79535-47bb-0310-9956-ffa450edef68