HBASE-7321 Simple flush online snapshot



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-7290@1445830 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7496 TestZKProcedure fails intermittently



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-7290@1445831 13f79535-47bb-0310-9956-ffa450edef68