Execute run with pretend in template testing

[vyasr]

With the addition of groups, template testing is no longer as useful because all the scripts just use python project.py run..., which prevents us from verifying that the mpirun, OMP_NUM_THREADS and other command prefixes are correctly handled. We should add a project.run(..., pretend=True) called to the template test output so that we can test this behavior in the future.

[kidrahahjo]

@vyasr I'd like to work on this issue. Can you please assign me this?

[vyasr]

Hi Hardik, I'm glad you're interested in working on this issue. Unfortunately, a significant component of this issue will be manually verifying the output of our job submission process. I'm triaging a lot of issues right now and will let you know as soon as I find one that would be appropriate for you to tackle.