ceph-common: set ms bind ipv6 = true in ceph.conf when using ipv6
ceph-common: set ms bind ipv6 = true in ceph.conf when using ipv6

This fixes an issue with parsing the ceph.conf file when ip_version is set to
ipv6.

See: https://bugzilla.redhat.com/show_bug.cgi?id=1419814

Signed-off-by: Andrew Schoen <1bb641dc23c3a93cce4eee683bcf4b2bea7903a3@redhat.com>

ceph/ansible-ceph-common