Updated openstack/openstack
Project: openstack/sahara  730c774ffbad9bd34fb36252620398d984f6b4a1

Update oslo-incubator network_utils module

Changes -
 * Use the standard python logging in network_utils
 * Set pbr 'warnerrors' option for doc build
 * Avoid raising index error when no host

Change-Id: I98bc7190b3ff63ac37b0993ccffffadd1163a89c