Added xvfb to services Wunderbyte-GmbH#68

.travis.yml

@@ -1,3 +1,5 @@
+dist: xenial
+
 language: php
 
 sudo: false
@@ -17,6 +19,7 @@ addons:
 
 services:
   - mysql
+  - xvfb
 
 php:
   - 7.1
@@ -68,9 +71,9 @@ install:
   # Check what versions are currently installed.
   - /usr/lib/chromium-browser/chromedriver --version
   - chromium-browser --version
-  - moodle-plugin-ci install  
+  - moodle-plugin-ci install
   - xvfb-run -a --server-args="-screen 0 1024x768x24" java -Dwebdriver.chrome.driver=/usr/lib/chromium-browser/chromedriver -jar ${MOODLE_SELENIUM_JAR} -log /tmp/selenium.log &
-  - php -t ${MOODLE_DIR} -S localhost:8080 > /tmp/php-access.log 2> /tmp/php-error.log &
+  - php -t ${MOODLE_DIR} -S localhost:8000 > /tmp/php-access.log 2> /tmp/php-error.log &
   - sleep 5s
 
 # Unit tests and behat tests against full matrix.