Create a V3 Token Generator

A token generator that can be used by other clients to generate
consistent tokens in there test code.

Change-Id: I05d2632b4c8290c2b1015996769340f0bea16f93
blueprint: share-tokens
CLI always configures logging

When the keystone CLI wound up logging something and --debug
wasn't set, a message was printed that 'No handlers could be
found for logger <whatever>'. This is because Python logging
was only configured when the --debug option was set.

This change makes it so that logging is always configured. If
--debug is used then the level is DEBUG and if it's not used
then the level is WARNING.

Change-Id: Ib01d1072acff0d6ede468b0ecab4f871459014ee
Closes-Bug: #936404
Merge "CLI always configures logging"
Merge "Create a V3 Token Generator"