Add OVS provider network params to all.pp

All.pp currently doesn't support provider networks with
OVS due to lacking a few of the necessary parameters.  This
patch adds them to enable all-in-one deployments that support
provider networks.

This commit is based on:
https://review.openstack.org/#/c/46306/
However it isn't cherry-picked due to the quantum->neutron
name change.

Change-Id: Ie2618bab4dcdded7b3c1711481ec603c1a9cf5ab
Implements: blueprint all-add-ovs-provider-params