HBASE-9387 Region could get lost during assignment



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1520092 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9428 Regex filters are at least an order of magnitude slower since 0.94.3

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1520100 13f79535-47bb-0310-9956-ffa450edef68