- This can be a tag or a branch (uses `git clone -b X`)

Update the CI scripts for the DIS stub to be consistent with the more generic DVMP scripts. Also did some more restructuring of the benchmark to make it easier to split off a generic benchmark library in the future.

- added some dummy junit reports.

 - We should limit the number of new environment variables. They
 increase complexity which should be mostly absorbed by using containers.
 - Any new environment variables should be set via the ci yml file
 or defined the UI. https://docs.gitlab.com/ee/ci/variables/README.html#custom-environment-variables
 - Removed dummy scripts
 - Removed dvmp dummy jobs.
 - Fixed dvmp output data. Note the out artifacts should go in
 `results/dvmp` if they are in the `dvmp` directory. This will just make
 things easier later on for collecting and summarizing results.
 - updated  dvmp/scripts/run_generator_instance.sh
 - Added dvmp.sh to run geant4/reconstruction. Note `dvmp/dvmp.sh` could be named something more specific, like `dvmp/dvmp_barrel_decays.sh` depending on the input, analysis, etc...