Initially Ubuntu/Debian used /var/run/openvswitch as default OVN run dir,
it seems it has changed long time ago - but we haven't picked that up on latest
OVN DB refactor.

Adding in OVN and OVN upgrade Debian jobs to enhance coverage.

Closes-Bug: #2035584

Change-Id: I78967c4499269578ac921ad9a553946b65e1293f