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