Updated openstack/openstack
Project: openstack/nova  2541405e0d440ee55f412cb64fffe990dfe5a461

Add custom is_backend_avail() method

Fast-and-dirty attempt to fix bug 1393633

Closes-Bug: #1393633

Change-Id: I2cc33ff4c6245e3e541222df60c0ca0a44b3d75a