Attempt fixing travis

Author: OsamaSayegh

.travis.yml

@@ -22,7 +22,6 @@ before_install:
       tar -xvf $PWD/travis_phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2 -C $PWD/travis_phantomjs;
     fi
   - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
 script:
   - bundle exec rubocop
   - bundle exec rake test
@@ -43,3 +42,4 @@ addons:
   postgresql: "9.3"
 services:
   - redis-server
+  - xvfb