Add Symfony 3 support

By updating the service definition to a symfony 3 supported format.

Author: MKodde

CHANGELOG

@@ -0,0 +1,7 @@
+
+VERSION 1  RELEASE OF A NEW VERSION
+===================================
+
+   Version 1.0.0 - Release of a new version
+      07/12/2017 14:41  1.0.0  initial release
+      11/12/2017 11:16  1.0.1  Symfony 3 support

src/Resources/config/services.yml

@@ -2,14 +2,14 @@ services:
     openconext.monitor.controller.info:
         class: OpenConext\MonitorBundle\Controller\InfoController
         arguments:
-            - ~
-            - %kernel.environment%
-            - %kernel.debug%
+            - '~'
+            - '%kernel.environment%'
+            - '%kernel.debug%'
 
     openconext.monitor.controller.health:
         class: OpenConext\MonitorBundle\Controller\HealthController
         arguments:
-            - @openconext.monitor.health_check_chain
+            - '@openconext.monitor.health_check_chain'
 
     openconext.monitor.health_check_chain:
         class: OpenConext\MonitorBundle\HealthCheck\HealthCheckChain