Updated openstack/openstack
Project: openstack/nova  1a6b89165a270c43fe1233105ea56c78cdc1b7f4

Enhance and test exception safety in hooks

This patch adds exception handling when calling pre and
post functions of hooks. Exceptions will be caught and
logged, but the hook chain and function call will be
allowed to proceed.

Partially implements: bp instance-network-info-hook

Change-Id: I45e76cd156c244ff57f77db103a9a579f14ad4f1