Set selinux label to ifcfg-eth0 when injecting it to the HE VM
Set selinux label to ifcfg-eth0 when injecting it to the HE VM

When we used copy-in to copy the ifcfg-eth0, it was not relabeled.
This caused permission denied issue for firewalld when trying to read it.
Fixed by using guestfish directly and using selinux-relabel command
to relabel it.

Change-Id: Id0067c121636dc120fbbc88eca3fa28a453b2acd
Signed-off-by: Yaniv Kaul <b08332cf9fad926fb2645965802bed3bc244a916@redhat.com>

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