rolling_update: require_osd_release pacific
rolling_update: require_osd_release pacific

Since [1] we need to set pacific for the required OSD release during the
upgrade.

[1] https://github.com/ceph/ceph/commit/cc99c3bc

Signed-off-by: Dimitri Savineau <a50a620e679eed14f4e99998b821cea8884cf228@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible