BLTI-254

Refactor the Dao-style calls to have isAdmin and isMaintain as boolean parameters

This looks like a bunch of stuff - but it really is just changing conventions between
the Base and DBImpl class - LTIService is unchanged.



git-svn-id: https://source.sakaiproject.org/svn/basiclti/trunk@127951 66ffb92e-73f9-0310-93c1-f5514f145a0a