Add a smoke test for MPI + OpenMP

[kennyweiss]

One of our user codes recently had an issue in an application that uses MPI and OpenMP.

The issue was related a change in the default mpibind policy on an LLNL platform. See https://github.com/LLNL/axom/issues/158 for more details.

BLT should have a C++ and a Fortran smoke test that uses OpenMP and MPI.