HBASE-9273 Consolidate isSystemTable checking

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1516041 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9276 List tables API should filter with isSystemTable

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1516044 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9277. REST should use listTableNames to list tables

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1516046 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9279. Thrift should use listTableNames to list tables

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