Use postgresql for travis

app/config/config_test.yml

@@ -19,8 +19,10 @@ liip_functional_test: ~
 
 doctrine:
     dbal:
-        default_connection: default
-        connections:
-            default:
-                driver:   pdo_sqlite
-                path:     %kernel.cache_dir%/test.db
+        driver:   "pdo_pgsql"
+        host:     "localhost"
+        port:     "5432"
+        dbname:   "travis_ci_test"
+        user:     "postgres"
+        password: "123456"
+        charset:  UTF8