HBASE-9160 TestNamespaceUpgrade fails on hadoop 2.1 due to existence of .snapshot directory in tar ball

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1513734 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9128 Drop the '.' prefix from names under hbase.rootdir after namespaces goes in

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1513735 13f79535-47bb-0310-9956-ffa450edef68