Add logging config values

This commit adds logging config values to Tempest. Users of Tempest can
know the config values exactly when Tempest runs.

Change-Id: I4ae50021812b7c49e26c19ef1db941e2eccec8c4
Add unit tests to tempest auth file

Some unit tests to tempest/auth.py which implements request authentication for
keystone v2 and v3 in tempest.

Still missing some tests to base_url methods that were failing, and need to be
reworked.

Partially implements bp unit-tests

Change-Id: I367caf4d83a33ad1675c2069e8ac0c442246f322
Merge "Add logging config values"
Merge "Add unit tests to tempest auth file"