Access RunReports in FinalReports function

[walterchris]

Currently after every run, the RunReport function from every registered reporting plugin will be invoked. After all runs, the FinalReport function will be invoked. It's not possible right now to access the RunReport report's from the FinalReport plugin. This way I can not access intermediate RunReports to generate a FinalReport out of this. So it would be nice if we can add the functionality such that I am able to access the RunReport reports (at least from the same plugin) during the FinalReport function.