Remove migrated service clients from test_service_client

As many service client have been migrated to Tempest-lib (0.10.0),
we can remove those service clients testing in test_service_client tests.

The main purpose of this test was for checking all parameters' values are
passed to RestClient via ServiceClient.

Now service clients in Tempest-lib directly inherited from RestClient
instead of ServiceClient.

Only service clients which are already migrated to lib are being removed
from this tests.

Change-Id: Ie4ed03ee4c8fd42d945da80b1c45d80cbec97b5c
1 file changed