Gating: remove vault and kdcproxy tests
Vault and KDC proxy are neither critical subsystems nor are they likely to
fail. They have been pretty stable and don't see any major development.
It's sufficient to run them in nightly tests only.
The removal speed up gating a bit. Especially vault tests are slow and
usually take more than 30 minutes to complete
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Oleg Kozlov <okozlov@redhat.com>