Fix keystoneclient so swift works against Rackspace Cloud Files

Fixes bug 1074784
https://bugs.launchpad.net/python-keystoneclient/+bug/1074784

RAX auth doesn't return a service catalog with an identity endpoint
that contains an auth URL.  This causes swift client to log an
error of "Authorization Failure. Authorization Failed: Endpoint not
found."

Change-Id: I26174a664029617f097dc35c57ef30b34cd2fb61

keystoneclient/v2_0/client.py

@@ -138,3 +138,8 @@ class Client(client.HTTPClient):
             # Unscoped tokens don't return a service catalog;
             # allow those to pass while any other errors bubble up.
             pass
+        except exceptions.EndpointNotFound:
+            # the client shouldn't expect the authenticating user to
+            # be authorized to view adminURL's, nor expect the identity
+            # endpoint to publish one
+            pass