successful notify response must have AA bit on.

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac221@2328 e5f2f494-b856-4b98-b285-d166d9295462

src/bin/auth/auth_srv.cc

@@ -427,6 +427,7 @@ AuthSrvImpl::processNotify(const IOMessage& io_message, Message& message,
     }
 
     message.makeResponse();
+    message.setHeaderFlag(MessageFlag::AA());
     message.setRcode(Rcode::NOERROR());
     message.toWire(response_renderer);
     return (true);