Add error logging around FIP delete
Add error logging around FIP delete

To help catch leaking floating IPs, let's add some logging that
might help us find out what's happening. We've been silently
throwing away exceptions from the delete API that might help us
narrow down the cause.

Change-Id: Ia54a19015725b1d10d3d36301e0aab7bae3e3f60

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