Conductor is a component in OTS Worker. Basically it does three things:
Conductor has got a command line interface. It can be used to manually execute one or more test packages from Worker PC. In this case, sending test results to OTS server is disabled. The test results are collected to a local folder (~/conductor/None) from where the user can examine them.
Here's an example how to execute two test packages with Conductor on command line:
sudo conductor -u http://my.build.host/sw/image/file -t mypackage1-tests,mypackage2-tests