Updated openstack/openstack
Project: openstack/horizon  ea7160694ed2a2db3c2a2bf0dde5786ceac02445

Use timeutils from oslo.utils

Rather than sync'ing with oslo-incubator, let's use the library
oslo.utils instead. Removing the local copy of timeutils.

Change-Id: I4fbc7e7637577fcad8281897f4286690b1bbd14d
Partially-Implements: blueprint improve-oslo-usage