packaging: setup: Return support of providing appliance OVA
packaging: setup: Return support of providing appliance OVA

The user is not obligated to install appliance rpm
but can provide an appliance OVA instead as was supported in previous
versions

Change-Id: If7ad006f2a11cd5200af8c604516d0ef0b8a2cf2
Bug-Url: https://bugzilla.redhat.com/1461251
Signed-off-by: Ido Rosenzwig <d3cf649376f7b9625b3012cf4ff65bcb09ba1a88@redhat.com>

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