Pass credentials to glance client.

The auth creds dict was created but not passed to the glance client,
causing the following tests to fail with 401 Unauthorized:

  CreateRegisterImagesTest.test_register_then_upload
  CreateRegisterImagesTest.test_register_with_invalid_data

Change-Id: Icca9632f5de66ee7e957116e8dc60b53de9c1c87
2 files changed