Revert "core: Set emulated machines after capabilities"

This reverts commit 9bf94d4a779719c4286f97a5f98166a7961866bf since
host cannot be added to empty cluster with this change.

Change-Id: I08a2350a83feba4f050e312bf23925ff56d9ec11
Signed-off-by: Arik Hadas <ahadas@redhat.com>