Run stripping for other any or all modes when running on MC

What are your thoughts on this implementation before I add the remaining lines?

Now the mode information is being passed to the DaVinci job should we prevent  the creation of Cheated/MCTupleTool trees when using MC from other modes?
It will be used to make DaVinci to run the PID stripping lines instead of the xsec ones. Currently is is only written to the [tags file](https://github.com/alexpearce/CharmProduction/blob/ganga_mc_stripping/options/ganga_simulation_S20.py#L90) as the [Dp stripping line](https://github.com/alexpearce/CharmProduction/blob/ganga_mc_stripping/options/run_stripping_lines_nopids.py#L34) doesn't appear to work. If you have any idea why I'd love to know. :+1: