Tests that create API tokens were updated to inlcude the token_generator_id

and token_info parameters when generating the tokens. This was done by

making mosts tests use the TestCase.create_webapi_token method instead of

directly calling WebAPIToken.generate_token. These parameters will be

required in Djblets 4.0 so we should add these in now to avoid unnecessary

deprecation warnings while running tests and so that we don't forget later.
This change also allows explicit local sites to be passed to

TestCase.create_webapi_token.

Ran the affected unit tests.