Tests of DistributedLaunchMode are now skipped if mpi4py is not installed
Tests of DistributedLaunchMode are now skipped if mpi4py is not installed

dpad/sumatra,open-research/sumatra,maxalbert/sumatra,apdavison/sumatra,open-research/sumatra,maxalbert/sumatra,open-research/sumatra,apdavison/sumatra,dpad/sumatra,dpad/sumatra,maxalbert/sumatra,apdavison/sumatra,maxalbert/sumatra,babsey/sumatra,babsey/sumatra,apdavison/sumatra,dpad/sumatra,babsey/sumatra,babsey/sumatra,dpad/sumatra,open-research/sumatra,babsey/sumatra,apdavison/sumatra,open-research/sumatra,maxalbert/sumatra