Removed parts that try to stop NWChem using xHost as they don't work - build it on older host.
Removed parts that try to stop NWChem using xHost as they don't work - build it on older host.

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