Fix #478: Override getRouteKey on the Route Entity (ORM) to return the route name rather than the numeric ID.

Author: dbojdo

src/Doctrine/Orm/Route.php

@@ -57,4 +57,12 @@ public function getPosition(): int
     {
         return $this->position;
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getRouteKey(): string
+    {
+        return $this->getName();
+    }
 }