Unknown argument exception when authenticating with token and bypass URL

[Kam Nasim]

During an upgrade scenario we need to use a bypass URL with an admin token to authenticate. The keystoneauth1 token AUTH plugin only expects two arguments to be passed in:
- the endpoint / bypass URL
- the token

If additional arguments are passed in then the Token Auth Plugin throws a Type Error due to Unexpected Keyword Arguments.

The Token Auth Plugin should ignore arguments that it doesn't care about, as users may have sourced an environment containing multiple arguments (in our case, it was complaining over OS_USER_DOMAIN_NAME)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/542355

[Kam Nasim (knasim-wrs)]

CI:
https://review.openstack.org/#/c/542355/

[Kam Nasim (knasim-wrs)]

As per my observation, this was working when TokenPlugin was in OpenstackSDK and before it was moved over to KeystoneAuth1. The same environment was working in Newton and broke when we rebased to Pike

[Morgan Fainberg (mdrnstm)]

Moving this to opinion. This is not really in line with how KSA1 is intended to be used. See comments from Colleen and myself on the patch for more info.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Morgan Fainberg (<email address hidden>) on branch: master
Review: https://review.openstack.org/542355
Reason: Administratively abandoning this change, we can restore if we need to revisit.