Revert "OpenMPI for GNU 7.3.0"
Revert "OpenMPI for GNU 7.3.0"

This reverts commit 8ebeb9936c7b604f4233414cb7ed86f0136ec91a.

UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts