Show domain name in the change project dropdown

When the OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT is enabled, the
domain's UUID  is being shown in the dropdown to change project.
This patch corrects it to show the domain's name.

Change-Id: I7719d615f736f9d36c305a48f8b4caecb4d0c4ca
Closes-bug: 1378034
Merge "Show domain name in the change project dropdown"