private static TableName getADummyTableName(String qualifier) {
    return new TableName(qualifier);
  }
It is used to create table names for old META, and ROOT table. These tables are not really
legal tables. They are not added into the cache.
@return a dummy TableName instance (with no validation) for the passed qualifier
hbase-common/src/main/java/org/apache/hadoop/hbase/TableName.java