repro: pyroute plugin: better exception handling

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10736 ddefafc4-47db-0310-ae44-fa13212b10f2
travis: build the pyroute plugin for repro

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10737 ddefafc4-47db-0310-ae44-fa13212b10f2