Use correct cache setting with swift authtoken

fixes bug 1131433

As noted in the bug report, bad things happen if
the wrong cache value is used with the authtoken
filter.

See associated update in swift repo:
https://review.openstack.org/#/c/22615

Change-Id: I979a9d7bce12867b3ec2dc303c4df74678ee9798
Merge "Use correct cache setting with swift authtoken"