Fix launchdev so it correctly uses VIRTUALENV variable everywhere.
Fix launchdev so it correctly uses VIRTUALENV variable everywhere.

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