Make sure we add lib/python3.x directory in the begining of PYTHONPATH for python runner actions for packs which were created with "use_python3=true" flag.
Make sure we add lib/python3.x directory in the begining of PYTHONPATH
for python runner actions for packs which were created with
"use_python3=true" flag.

This way we ensure modules and packages from Python3 directory are used
before modules and packages from python2.7 site-packages directory.

This way we avoid issues such as the one with the enum import.

StackStorm/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,nzlosh/st2,Plexxi/st2,Plexxi/st2,StackStorm/st2,nzlosh/st2,nzlosh/st2,StackStorm/st2,Plexxi/st2