scripts: cleaned and improved policy scripts

The policy scripts can handle now client nodes that want to be linked with other
client nodes. This is needed for nodes created by the Pulse Audio Volume Control
to monitor audio comming from other application client nodes.
2 jobs for monitor-fixes in 1 minute and 36 seconds
Status Job ID Name Coverage
  Container
passed container_fedora #9637628

00:00:21

 
  Build
passed build_on_fedora #9637629

00:01:14