Fix debug logging lines
Fix debug logging lines

There were several places where the exc_info parameter to the
logging.debug() method was included inside of string.format()
methods.

Change-Id: I696e03c95c101d612174e78604f2753cf41a0d6b

openstack/python-openstacksdk,jsmartin/shade,openstack-infra/shade,openstack/python-openstacksdk,dtroyer/python-openstacksdk,openstack-infra/shade,stackforge/python-openstacksdk,stackforge/python-openstacksdk,jsmartin/shade,dtroyer/python-openstacksdk