Don't mount netns or /run from host system

If we mount /run or /run/netns then it leads to broken netns on
a host system level. Also when we remove pods those netns bind
files remain. This aslo causes problems for Kubernetes + Calico:
https://github.com/projectcalico/libcalico/issues/148

Closes bug: #1630202

Change-Id: I37c0783de6d6264ccf73648a1d15b23fdc31ad99

service/neutron-openvswitch-agent.yaml

@@ -10,9 +10,9 @@ service:
         readiness: "true"
         liveness: "true"
       volumes:
-        - name: run
+        - name: ovs-socket
           type: host
-          path: /run
+          path: /run/openvswitch
         - name: modules
           type: host
           path: /lib/modules