Override configure_logging to quieten iso8601 and requests
Override configure_logging to quieten iso8601 and requests

This prevents the following messy output:

 Starting new HTTP connection (1): localhost

Change-Id: Ibb80f792939441dc90c4a041ae83f38b0c7e3ec2

openstack/python-mistralclient,StackStorm/python-mistralclient,openstack/python-mistralclient,StackStorm/python-mistralclient