Revert "Update .travis.yml"

This reverts commit a658f570

.travis.yml

@@ -31,8 +31,7 @@ jobs:
       script:
         - mvn verify -Pacceptance-test jacoco:report --settings "settings.xml"
       after_success:
-        - if: branch = master
-        - mvn -B deploy --settings "./settings.xml"
+        - if [ "${TRAVIS_BRANCH}" == "master" ]; then mvn -B deploy --settings "./settings.xml"; fi
 
 after_success:
  - bash <(curl -s https://codecov.io/bash) || echo "Codecov did not collect coverage reports"