1.6 enforced, removed env for 1.5 (now in makefile)
1.6 enforced, removed env for 1.5 (now in makefile)

luqasz/gollum,relud/gollum,relud/gollum,mre/gollum,trivago/gollum,luqasz/gollum,trivago/gollum,mre/gollum