IT for provider network

IT for provider network

Ping between ports on different nodes
Uses a docker image that:
a) expects two networks, one for mgmt traffic and one for the provider
network
b) binds ovsdb-server to the mgmt nic only
c) sets the provider nic in provider_mappings

Details about the image can be found here:
https://github.com/jhershberg/docker-centos-ovs/tree/two-nics

This commit depends on:
https://git.opendaylight.org/gerrit/#/c/47757/

Change-Id: Ia912dd12ed44769df3c94708712ddeda3f59d669
Signed-off-by: Josh <jhershbe@redhat.com>