Remove test_auth_token.py

The tests in test_auth_token didn't really add an value. They just
ran a server list command and hoped it didn't throw an exception. If
there was an issue with this then all the api tests would fail, so
there is no value in these tests.

Change-Id: I14e0c0284170219c028454990f189440ffeb0b08
Merge "Remove test_auth_token.py"