Support building/installing python2 and 3

Signed-off-by: Mark Hymers <mark.hymers@ynic.york.ac.uk>
1 job for 3-make-makefile-support-python2-and-3 in 21 minutes and 47 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build Test
passed #1630
build_test

00:21:47