common: add tools repo for iscsi gw
common: add tools repo for iscsi gw

To install iscsi gw packages we need to enable the tools repo.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1547849
Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

ceph/ansible-ceph-common