Updated openstack/openstack
Project: openstack/neutron  ff22dc1a7c3803634288fdd4da66c51a22593c2e

Improve ODL ML2 Exception Handling

Raise a MechanismDriverError when authentication with ODL fails.
Re-raise HTTPError in "sync_resources" for exceptions whose status code is not 404.

Closes-Bug: #1311758
Change-Id: I99d2c4f270007c369024525ba4e6188d232a0b13