Use sudo for unbound forwarding.conf in configure_mirror.sh
Use sudo for unbound forwarding.conf in configure_mirror.sh

We need sudo permissions to write the forwarding.conf file.

Change-Id: I788915fccc5ac92b57b6a0815b90c40e32948bed
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

openstack-infra/project-config,openstack-infra/project-config