Add OVN support

Install docs:
https://docs.openstack.org/networking-ovn/latest/install/index.html

Partial Prod: PROD-15003

Co-Authored-By: Elena Ezhova <eezhova@mirantis.com>
Change-Id: I0a7023f3e14aae6d5ec5efe8f117ebc9d0ed302d
diff --git a/.travis.yml b/.travis.yml
index 779286f..cc2ce87 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,6 +32,7 @@
     - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_qos_sriov
     - PLATFORM=trevorj/salty-whales:trusty SUITE=compute_qos
     - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_qos
+    - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_ovn
     - PLATFORM=trevorj/salty-whales:trusty SUITE=control_cluster
     - PLATFORM=trevorj/salty-whales:xenial SUITE=control_cluster
     - PLATFORM=trevorj/salty-whales:trusty SUITE=control_dvr
@@ -44,6 +45,7 @@
     - PLATFORM=trevorj/salty-whales:xenial SUITE=control_fwaas_v1
     - PLATFORM=trevorj/salty-whales:trusty SUITE=control_qos
     - PLATFORM=trevorj/salty-whales:xenial SUITE=control_qos
+    - PLATFORM=trevorj/salty-whales:xenial SUITE=control_ovn
     - PLATFORM=trevorj/salty-whales:trusty SUITE=gateway_dvr
     - PLATFORM=trevorj/salty-whales:xenial SUITE=gateway_dvr
     - PLATFORM=trevorj/salty-whales:trusty SUITE=gateway_legacy