HBASE-8832 Ensure HBASE-4658 is supported by Thrift 2 (Hamed Madani)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1502433 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8934 Fix bunch of flaky tests

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1502628 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8914 [0.94] TestRegionServerCoprocessorExceptionWithAbort is flaky

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