Support SSL and trace params in get_credentials

Three additional parameters were added to token client in
https://review.openstack.org/#/c/159267/, which need to be
passed to any instantiation of token client within tempest.

Creating credentials via the get_credentials function,
with fill_in enabled, instantiates an AuthProvider, and
thus a token client, without passing the three new
parameters. Fixing that.

Closes-bug: #1429878
Change-Id: I9340d02cfa560e3e3e30dd5f9f7fd65da8181755
2 files changed