tests: move more fakes into vmfakelib

This patch move more Fakes into the common
library, to avoid duplication and to give them
better spotlight.

Beside renames (e.g. FakeSuperVdsm -> fake.SuperVdsm)
there are no code changes.

Change-Id: Ib2f844a6586eca567fede25b193a762318badd9f
Signed-off-by: Francesco Romani <fromani@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/32821
Reviewed-by: Dan Kenigsberg <danken@redhat.com>