packaging: accept ovirt-engine-appliance-4.2
packaging: accept ovirt-engine-appliance-4.2

Appliances built form master are now versioned as 4.2.

Change-Id: Ib3005286f2abdca258a44b7fa44e9914059f68a0
Signed-off-by: Simone Tiraboschi <cb03129c66ba4da7ba7044049d0f43907bf857bb@redhat.com>

oVirt/ovirt-hosted-engine-setup,oVirt/ovirt-hosted-engine-setup