Fix for RunInfo PopCon tools for 72X

This Pull Request is a back port of #6525 . It contains the fixes for allowing the RunInfo PopCon jobs to use the dropbox, and not the direct access to Oracle:
* Cleanup of the source handler
* Pass the run number from configuration, not standard input
* Use two connections, both to the target DB for looking at the last IOV, and to a local file for writing the new payload.