Only try to deploy when master and not a pull request

Author: Michael Freedman

script/deploy-staging.sh

@@ -2,7 +2,7 @@
 
 set -ev
 
-if [[ "$TRAVIS_BRANCH" == "master" ]]; then
+if [[ "$TRAVIS_BRANCH" == "master" ]] && "$TRAVIS_PULL_REQUEST" == false; then
   wget -q -O cf-cli.deb https://cli.run.pivotal.io/stable?release=debian64
   sudo dpkg -i cf-cli.deb
   cf login -u $CF_USERNAME -p $CF_PASSWORD -o pivotallabs -s whiteboard -a https://api.run.pivotal.io