SAK-24423 Update the sitestats mock to match the new API.

git-svn-id: https://source.sakaiproject.org/svn/sitestats/trunk@133720 66ffb92e-73f9-0310-93c1-f5514f145a0a
STAT-342 Switch back to using HSQLDB for tests.

git-svn-id: https://source.sakaiproject.org/svn/sitestats/trunk@133721 66ffb92e-73f9-0310-93c1-f5514f145a0a