apply the same fixes from https://github.com/sapcc/openstack-nannies/pull/69 to sync_share_snapshot_state() e.g. log when a snap is skipped, fix for stuck in `creating`, add `--debug`
apply the same fixes from #69 to sync_share_snapshot_state()
e.g. log when a snap is skipped, fix for stuck in
creating, add--debug