Rename shell namespace to service_manager

services/service_manager/tests/test.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module shell;
+module service_manager;
 
 interface TestService {
   Test(string test_string) => ();
 };
 
 interface TestA {
   CallB();
   CallCFromB();
 };
 
 interface TestB {
   B() => ();
   CallC() => ();
 };
 
 interface TestC {
   C() => ();
 };