with calls specific to the appdb or bugzilla database. Fixes a bug where a call to
mysql_insert_id() can potentially retrieve an id from either the bugzilla or appdb database,
depending on whichever database was last opened by mysql_connect().
Application::delete() should retrieve the applications versions immediately prior to deleting to ensure that
an application object created prior to its child versions doesn't leave orphaned versions. Add unit test for
Application::delete() to test for the offending behavior.
