Fix credentials_factory method call

The method has changed from get_configured_credentials to
get_configured_admin_credentials.

This is one of the parts imported directly from tempest
(not tempest.lib) so there is no "care" in keeping it stable.

Change-Id: I0072157d0cf9ab87a5b939868ae4a1d0bbec294b
1 file changed
tree: cba523791346c34771f2374cf3a6167104813e7c
  1. keystone_tempest_plugin/