Updated openstack/openstack
Project: openstack/nova  2ca078811c2d0922d3faba21b32577a37386f26c

Catch ComputeServiceUnavailable on v2 API

currently nova catch ComputeServiceUnavailable when doing
host API function only on v3, this patch add it for v2.

Change-Id: I557ed212f5b9afa1274a6e6c6343754c7e89b17f