Energy scan plotter does not work without some specific targets

[RenHirayama]

I have tried using the energy scan for non-default targets (π⁻C and π⁻W), by commenting out the other run_one_energy commands in test/energy_scan/CMakeLists.txt. The runs and analysis work fine, but currently the plotter requires that:

1. There is a target for pp at sqrt(s) = 2.695 GeV [lines 132/147 in the CMakeLists.txt]
2. Any AuAu/PbPb target is present (doesn't matter which, but I did not find out why yet)

Also, when these conditions are met, the plotter works but doesn't use different colors for each new target, which is undesirable. For instance (nevermind the few targets and small statistics):

Furthermore, it would be interesting to make plotting targets for each individual system, rather than one make energy_scan_plots which demands runs for all present targets.

[NGoetz]

In general it would be desirable to have a more flexible energy scan, but this requires substantial modifications as it is currently very much designed for only executing the standard set.
The thing with AuAu/PbPb could be connected to lines regarding the Afterburner test.
That plotting targets are not available for individual systems is probably related to spectra.

[RenHirayama]

For a more flexible energy scan I agree (such as individual plotting targets, selecting rapidity ranges and so on), it would be somewhat demanding. But the basic machinery already allows for the run/analysis of non-standard systems, the only missing “component” is the plotting itself, which doesn't seem too complicated and fixing it may be worth the effort.