Updated openstack/openstack
Project: openstack/nova  1ff05b4c96a62d60bbcb9e2def7fb88b5cecdb84
null
Sync timeutils from oslo-incubator

Sync the following commit:

ae931a9 Avoid TypeError in is_older_than, is_newer_than

Change-Id: I963c79599fe6731dd84c90ee3f3fbfb02505e045
Partially-implements: blueprint periodic-tasks-to-slave
Related-Bug: #1259383