Add all-in-one local.conf with OVS networking
Add all-in-one local.conf with OVS networking

This adds an example local.conf for an all-in-one devstack using Open
vSwitch networking.

Change-Id: I597d45d88c68942377d412b2bd47142fe23f754c

openstack/nova-powervm,stackforge/nova-powervm,openstack/nova-powervm,stackforge/nova-powervm