Updated openstack/openstack
Project: openstack/python-keystoneclient  f050dd9448e5836573bbc392fa3c19dc402be4a5

Fix docstrings in keystoneclient

Trusts and service catalog had a few malformed docstrings
that caused warnings when building docs.

Change-Id: Iea8612c3aaebea54c00b02c73c77f0c9e79f86bc
Partial-Bug: #1315523