Alters $version property to $current_version

To avoid collision with route param 'version' from the Doctrine integration with Apigility

src/ZucchiDoctrine/Entity/AbstractEntity.php

@@ -43,7 +43,7 @@ class AbstractEntity implements
      * @ORM\Column(type="integer")
      * @Form\Exclude
      */
-    protected $version;
+    protected $current_version;
 
 
     /**
@@ -162,4 +162,4 @@ public function fromArray($options)
             }
         }
     }
-}
+}