Merge pull request #66 from pyiron/lammps_mpi

LAMMPS: Use mpi executable for serial execution

lammps/bin/run_lammps_2020.03.03.sh

@@ -1,2 +1,2 @@
 #!/bin/bash
-exec lmp_serial -in control.inp;
+mpiexec -n 1 --oversubscribe lmp_mpi -in control.inp;