allow monolog 2.1 to enable testing of Symfony 2.1 compatibility

Author: lsmith77

composer.json

@@ -18,7 +18,7 @@
         "doctrine/phpcr-bundle": "1.0.*",
         "doctrine/data-fixtures": "1.0.*",
 
-        "symfony/monolog-bundle": "~2.2",
+        "symfony/monolog-bundle": "~2.1",
 
         "jackalope/jackalope": "~1.0.0-beta1",
         "jackalope/jackalope-doctrine-dbal": "1.0.*"