R 3.4.2: removing Postgres as this didn't solve dependency problem.
R 3.4.2: removing Postgres as this didn't solve dependency problem.

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