Declare the MySQL service in the Drone configuration.

Author: pfrenssen

.drone.yml

@@ -7,6 +7,10 @@ services:
     image: ${IMAGE_PHP=fpfis/httpd-php-dev:7.1}
     environment:
       - DOCUMENT_ROOT=/test/behat-traits
+  mysql:
+    image: percona/percona-server:5.6
+    environment:
+      - MYSQL_ALLOW_EMPTY_PASSWORD=yes
 
 pipeline:
   composer-install-lowest: