HBASE-8152 Avoid creating empty reference file when splitkey is outside the key range of a store file (clockfly)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1462880 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8226. HBaseTestingUtility#waitUntilAllRegionsAssigned won't return if it counts "too many" regions
HBASE-8232. TestAccessController occasionally fails with IndexOutOfBoundsException