Fix several deprecation warnings in the logger

Author: Martin de Keijzer

app/config/config.yml

@@ -92,7 +92,7 @@ monolog:
         console:
             type: console
             bubble: false
-            channels: [!livebroadcaster]
+            channels: ["!livebroadcaster"]
         livebroadcaster:
             type: rotating_file
             path: "%kernel.logs_dir%/%kernel.environment%-livebroadcaster.log"

app/config/config_dev.yml

@@ -17,10 +17,10 @@ monolog:
             type: stream
             path: "%kernel.logs_dir%/%kernel.environment%.log"
             level: debug
-            channels: [!event]
+            channels: ["!event"]
         console:
             type:   console
-            channels: [!event, !doctrine]
+            channels: ["!event", "!doctrine"]
         # uncomment to get logging in your browser
         # you may have to allow bigger header sizes in your Web server configuration
         #firephp: