Add use of openvswitch interface (wip), keep sudo running to placate ovs-agent, drop override of root_helper

snap/bin/sudo

@@ -2,4 +2,4 @@
 # fake sudo script - as daemons run as root use of real sudo is not required
 # strip sudo off args and re-exec command
 
-exec ${@:1}
+${@}

snap/etc/neutron/neutron.conf

@@ -1,6 +1,2 @@
 # Snap provided defaults for neutron agents
 [DEFAULT]
-
-[AGENT]
-# Disable root_helper for snap usage
-root_helper =

snap/etc/nova/nova.conf

@@ -1,6 +1,5 @@
 [DEFAULT]
 compute_driver = libvirt.LibvirtDriver
-root_helper =
 
 [libvirt]
 virt_type = kvm

snapcraft.yaml

@@ -27,6 +27,7 @@ apps:
       - firewall-control
       - system-trace
       - libvirt
+      - openvswitch
   neutron-openvswitch-agent:
     command: snap-openstack neutron-openvswitch-agent
     daemon: simple
@@ -38,6 +39,7 @@ apps:
       - process-control
       - system-trace
       - system-observe
+      - openvswitch
   neutron-l3-agent:
     command: snap-openstack neutron-l3-agent
     daemon: simple
@@ -48,6 +50,7 @@ apps:
       - process-control
       - system-trace
       - system-observe
+      - openvswitch
   neutron-dhcp-agent:
     command: snap-openstack neutron-dhcp-agent
     daemon: simple
@@ -57,6 +60,7 @@ apps:
       - process-control
       - system-trace
       - system-observe
+      - openvswitch
   neutron-metadata-agent:
     command: snap-openstack neutron-metadata-agent
     daemon: simple
@@ -69,6 +73,7 @@ apps:
     plugs:
       - network
       - network-control
+      - openvswitch
   neutron-netns-cleanup:
     command: snap-openstack neutron-netns-cleanup
     plugs: