tests: Remove dead code

Commit 36a81b5aef added the legacy getServices interface, which is not
part of the ModuleConfigurator. The new services property is inherited
from the super class, so there is no need to implement it.

Change-Id: I32c23258e90ff8551131c2703ebd2c1238d46494
Signed-off-by: Nir Soffer <nsoffer@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/32725
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: mooli tayer <mtayer@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>