Revert "[server][testHostResourceQueryOptionSubClasses] Fix an expected value that have been changed by the commit: 467e64bc."

This reverts commit 5f2d3a27153f8e3bacabd91079e77356f653ed63.

In the query of hostgroup, it is not needed to do join, because
the table naturally has hostgroup id.
[server][HostResourceQueryOption] Make it easy to check if the joint with the hostgroup map table is needed.