Updated openstack/openstack
Project: openstack/glance_store  f181b61e3633bd75048649ec38f49566093d7bd1

Remove network_utils

It is not good to add dependency on oslo-incubator if we can
avoid it. Moreover, there is no `network_utils.py` in
oslo-incubator. Use oslo.utils instead.

Change-Id: Iacc7c36ff83ee9698ee669a5ecc56dd452cc7575