make acl_list return a a list instead of a string

Author: AndyMoore

actions/acl_list.py

@@ -5,4 +5,4 @@
 
 class ConsulAclListAction(action.ConsulBaseAction):
     def run(self):
-        return (True, json.dumps(self.consul.acl.list()))
+        return (True, self.consul.acl.list())