Should starting_dir be passed in to the repro...() functions?

[langfob]

Working on adding the ensemble problem code, I'm having to add the starting_dir as an argument to lots of different functions, however, it's not clear whether to add that argument to the functions RSrun.R::repro_RSrun() and do_Greedy_analysis_and_output.R::repro_do_Greedy_analysis_and_output(). I don't know if that would break their reproductive nature or not, so I've just taken what they're already using as the directory and just set starting_dir to that value so that it can be passed down to functions they call. These runs aren't currently called anywhere, so it's not a pressing issue at the moment. The change is done in commit aedef156 on the ensemble_1 branch on 2018 12 09 at around 2:03 pm (titled: "Add starting_dir for repro_...() functions - but possibly not right".)