Adds openstack-config options for Red Hat and SUSE distros

Documentation for configuring networking on dedicated network
node expected manual configuration file changes. Red Hat and SUSE
based platforms support openstack-config. These changes need to
be replicated for dedicated-network and compute host where appropriate.

Change-Id: I7cc23370fad0c441b1f8fcf8a7781c58b17fbd59
Closes-Bug: 1266409
Merge "Adds openstack-config options for Red Hat and SUSE distros"