Allow configuration of a zone group default sync policy. This is useful
in scenarios where we want to have selective buckets sync. Valuable
especially with the new `cloud-sync` relation.
This is based on Ceph multisite sync policy:
https://docs.ceph.com/en/latest/radosgw/multisite-sync-policy/
Additionally, three more Juju actions are added to selectively enable,
disable, or reset buckets sync:
* `enable-buckets-sync`
* `disable-buckets-sync`
* `reset-buckets-sync`
These new actions are meant to be used in conjunction with a default
zone group sync policy that allows syncing, but it's disabled by default.
Change-Id: I4a8076192269aaeaca50668ebcebc0a52c6d2c84
func-test-pr: https://github.com/openstack-charmers/zaza-openstack-tests/pull/1193
Signed-off-by: Ionut Balutoiu <ibalutoiu@cloudbasesolutions.com>
4e608c1485