Updated openstack/openstack
Project: openstack/nova  07f79970834dc66f79f138f1bddfd8247e8b4287

Cleanup of exception handling in network REST API plugin

Cleans up exception handling in the os-network API plugin so
that rather than very generic catching of exceptions, we only catch
those that we expect can occur. Adds new test cases where appropriate,
though some of the exceptions already had testcases.

Change-Id: Ie25f0cc60d157e259463a9e00c5639a09a869fce