Updated openstack/openstack
Project: openstack/nova  6ae32ef483fca9e71be24678c6abf20436b717a2
null
XenAPI: Use get_VALUE in preference to get_record()['VALUE']

Replaces calls to get_record where only a single item is retrieved
from the record with the specific get_VALUE call.

Change-Id: I52e20c4f4c9d6a6ad019694916ee057cc96b18a6