Make grep quiet when setting env vars

.travis.yml

@@ -23,8 +23,8 @@ env:
   - GIT_NAME="Dave Syer"
   - GIT_EMAIL=dsyer@pivotal.io
   - CI_DEPLOY_USERNAME=buildmaster
-  - FEATURE_BRANCH=$(echo ${TRAVIS_BRANCH} | grep "^.*/.*$" && echo true || echo false)
-  - SPRING_CLOUD_BUILD=$(echo ${TRAVIS_REPO_SLUG} | grep "^spring-cloud/.*$" && echo true || echo false)
+  - FEATURE_BRANCH=$(echo ${TRAVIS_BRANCH} | grep -q "^.*/.*$" && echo true || echo false)
+  - SPRING_CLOUD_BUILD=$(echo ${TRAVIS_REPO_SLUG} | grep -q "^spring-cloud/.*$" && echo true || echo false)
   - MVN_GOAL=$([ "${TRAVIS_PULL_REQUEST}" == "false" -a "${TRAVIS_TAG}" == "" -a "${FEATURE_BRANCH}" == "false" -a "${SPRING_CLOUD_BUILD}" == "true" ] && echo deploy || echo install)
   - VERSION=$(mvn validate | grep Building | head -1 | sed -e 's/.* //')
   - MILESTONE=$(echo ${VERSION} | egrep 'M|RC' && echo true || echo false)