Fix catalog list when region name is absent

Some service catalogs in the wild have services without region names defined.
Let's be nice and stuff in a default value indicating this state.

Closes-Bug: #1429211
Change-Id: I3ebe2534dc6e3438aaeddc7757fb2db4117eae4b

openstackclient/identity/v2_0/catalog.py

@@ -28,7 +28,8 @@ def _format_endpoints(eps=None):
         return ""
     ret = ''
     for index, ep in enumerate(eps):
-        ret += eps[index]['region'] + '\n'
+        region = eps[index].get('region', '<none>')
+        ret += region + '\n'
         for url in ['publicURL', 'internalURL', 'adminURL']:
             ret += "  %s: %s\n" % (url, eps[index]['publicURL'])
     return ret