Use $TRAVIS_PULL_REQUEST env var for Travis to remove the cache
Use $TRAVIS_PULL_REQUEST env var for Travis to remove the cache

Fix missing ';' in travis.yml

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