Allow injecting container into Configuration

Adresses doctrine/DoctrineMigrationsBundle#27

lib/Doctrine/DBAL/Migrations/Configuration/Configuration.php

@@ -95,6 +95,13 @@ class Configuration
      */
     private $migrations = array();
 
+    /**
+     * Container-like interface
+     *
+     * @var object
+     */
+    private $container;
+
     /**
      * Construct a migration configuration object.
      *
@@ -146,6 +153,26 @@ public function getName()
         return $this->name;
     }
 
+    /**
+     * Set container-like interface
+     *
+     * @param object $container
+     */
+    public function setContainer($container)
+    {
+        $this->container = $container;
+    }
+
+    /**
+     * Returns container
+     *
+     * @return object
+     */
+    public function getContainer()
+    {
+        return $this->container;
+    }
+
     /**
      * Returns the OutputWriter instance
      *