rhcs: re-add apt-pining
rhcs: re-add apt-pining

When installing rhcs on Debian systems the red hat repos must have the
highest priority so we avoid packages conflicts and install the rhcs
version.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1565850
Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

ceph/ansible-ceph-common