Markup properties

Ensure that various data items are available via the relation
adapters in charms.openstack by marking functions as properties.

This equates to the auto_accessors lists in the ceph-client and
ceph-mds RelationBase endpoint implementations.

Change-Id: I240552158475635d6996c622bf17eb6dd73b5d81

src/ceph_mds/requires.py

@@ -44,6 +44,7 @@ class CephClient(base_requires.CephRequires):
     def broken(self):
         super().broken()
 
+    @property
     def fsid(self):
         return self.all_joined_units.received.get('fsid')
 

src/lib/base_requires.py

@@ -31,9 +31,11 @@ class CephRequires(reactive.Endpoint):
     def joined(self):
         reactive.set_flag(self.expand_name('{endpoint_name}.connected'))
 
+    @property
     def key(self):
         return self.all_joined_units.received.get('key')
 
+    @property
     def auth(self):
         return self.all_joined_units.received.get('auth')