core: Remove AuditLogableBaseMockUtils

AuditLogableBaseMockUtils was used to mock VmDAO in tests for bll
commands. since this can now be done directly, this class is not longer
required.

Change-Id: Ib44258e3679ef3cd1d05aa4326ec09fff4c9d2bd
Signed-off-by: Allon Mureinik <amureini@redhat.com>