Updated openstack/openstack
Project: openstack/nova  7c7606d2308cec45d2cf3c318b03e8dc89c239eb

Catch NotImplemented nova exceptions in API extension

Catch currently uncaught NotImplemented nova exceptions
in floating_ip_dns and explicitly convert to HTTPNotImplemented
errors. This avoids tracebacks in the log files.

Change-Id: Idc8d9437920ab0ffcd6cb49db73dae63bcabab0e