@Override
    public TableName getTableName() {
      return tableName;
    }
The systemUserConnection created here is tied to the system user. In case, you are planning to
create AccessTestAction, DON'T use this systemUserConnection as the 'doAs' user gets eclipsed
by the system user.
hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java