Remove redundant domStatuses parameter from validateAttachedDomain()

The only possible status of a SD belonging to a pool are active or
attached.
Then the domain status is irrelevant when checking membership to
the pool.

Change-Id: Ib3daea2fa5928dee18efdf6452b65fbc212eec54
Signed-off-by: Eduardo <ewarszaw@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/14012
Reviewed-by: Vered Volansky <vvolansk@redhat.com>
Reviewed-by: Yeela Kaplan <ykaplan@redhat.com>
Tested-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>