mimic: Sync charms.ceph for misc fixes

Ensures mon cluster is not queried early in unit lifecycle
when the cluster is not bootstrapped or accessible by the
ceph-osd unit.

Block device sizes are set in local config so querying the
monitor is OK to skip.

Change-Id: Iea37455b0946560056ee665e819ee0a2a4a7832c

lib/ceph/utils.py

@@ -1717,6 +1717,7 @@ def get_conf(variable):
     return subprocess.check_output([
         'ceph-osd',
         '--show-config-value={}'.format(variable),
+        '--no-mon-config',
     ]).strip()