Switching MYSQL travis to 5.7

Author: moufmouf

.travis.yml

@@ -5,13 +5,18 @@ cache:
   directories:
     - $HOME/.composer/cache
 
-# We need MySQL 5.7 to test JSON columns
 services:
-  - docker
+  - mysql
 
-before_install:
-  - sudo service mysql stop || sudo service mysql-5.6 stop || sudo stop mysql-5.6 || sudo stop mysql || echo "failed to stop mysql"
-  - sudo docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root mysql:5.7
+addons:
+  apt:
+    sources:
+      - mysql-5.7-trusty
+    packages:
+      - mysql-server
+
+dist: trusty
+sudo: required
 
 env:
   matrix: