AMBER: pin numpy version to one that works on Py2
AMBER: pin numpy version to one that works on Py2

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