Updated openstack/openstack
Project: openstack/nova  53244277055f7dbf93dfccf3ae350c372eea4b27

Code cleanup: quota limit validation

In the quota limit validation, the conditional expressions are
difficult to understand because -1 which means an unlimited value is
compared directly.

By converting -1 to infinity, the validation can be implemented with
simple numeric comparisons. It makes code maintenance much easier.

Change-Id: I74650cba121734a14d31b76607adea004804c815