packaging: Add task cleaner utility to ovirt-engine-setup rpm

Add the task cleaner utility to ovirt-engine-setup rpm.
In this way, the utility will always be avaialble for engine-upgrade.

Change-Id: I854768c529965043bebee4a3c2e43dc674418216
Signed-off-by: Ofer Schreiber <oschreib@redhat.com>