Updated openstack/openstack
Project: openstack/trove  1ebc9347cc220d3d8b44a74d21d6e2bbf2e6412a
null
check for invalid hostnames on update_attributes

Adds the hostname validation and username validation to the
update_attributes code for users to prevent bad data getting
into the system and breaking in unexpected places.

Change-Id: Ib501357e45e99945ab972ceed044efc1e2377de5
Closes-Bug: 1235845