Updated openstack/openstack
Project: openstack/python-troveclient  9950cd9a7bca22b01e53e2e79f6e36c516eef589

Added check for empty attributes in trove CLI

Validated that new attributes are passed in for
user-update-attributes.  Added unit test and changed help message.

Change-Id: I1363278912fb5ffddd2e64550dc6ba70df8a9df8
Closes-Bug: #1298760