In 0df91a7f79 a comparison
between ``updated_at`` field from services table and update time
from memcache was added if the servergroup_driver is set to be
mc.
This could be problematic if servergroup_driver=mc and
``[DEFAULT]/enable_new_services`` option in /etc/nova/nova.conf
is set to be ``False`` at the same time, as the ``updated_at``
field will always be ``Null`` in services record.
This patch fixes the bug by returning ``updated_time_in_mc`` instead
under the above mentioned scenario.
Closes-Bug: #1781880
Change-Id: I27160140cbccf3e6914aed2dcff54d547e446c1f
0f4e5c442c