Add to testing an MPI compiler that is only 3.0 compliant

[brtnfld]

Since the minimum required MPI standard is 3.0 for 1.14, we should add testing for an MPI 3.0-only release such as MPICH or OpenMPI. This testing probably does not need to be part of a pull request action.

[brtnfld]

For mpich, you can use v3.0.4