Implementing Upgrade ART test for the full chain - Produce Plots via PhysVal

First draft of a mu=0 test that runs from EVNT->NTUP_PHYSVAL. Then produces a dcube page with a selection of plots for all reco domains. Keeping draft while running few more tests on the test to see if the merging and plot-post-processing is working as indented. In additiona, a PILEUP test will be included as well as well in the future.
The xml file still needs to be slimmed further for most important plots and then uploaded to cvmfs.

Here is a link to dcube output: https://npetters.web.cern.ch/npetters/dcube/dcube_wrt_last_nightly/ Running on 4000 ttbar mu=0 atm.

FYI: @tadej @tstreble @jmasik @nstyles