Refactor to register using explicit types rather than bean.getClass() canonical name

[rbygrave]

The issue is with @Factory @Bean methods. These can return anonymous classes or real classes and we can get subtle behaviour here.

This change removes the use of bean.getClass() when registering and changes to explicit types.

  @Bean
  @Named("BuildDesi1")
  DesEngi buildEngi() {
    methods += "|buildEngi1";
    return new DesEngi(){
      @Override
      public String ignite() {
        return "buildEngi1";
      }
    };
  }

  @Bean
  @Named("BuildDesi2")
  DesEngi buildEngi2() {
    methods += "|buildEngi2";
    return new MyEngi();
  }

With current generated code explicitly registering both DesEngi.class, Engi.class types.

  /**
   * Create and register DesEngi via factory bean method MyFactory#buildEngi().
   */
  public static void build_buildEngi(Builder builder) {
    if (builder.isAddBeanFor("BuildDesi1", DesEngi.class, Engi.class)) {
      MyFactory factory = builder.get(MyFactory.class);
      DesEngi bean = factory.buildEngi();
      builder.register(bean, "BuildDesi1", DesEngi.class, Engi.class);
    }
  }

  /**
   * Create and register DesEngi via factory bean method MyFactory#buildEngi2().
   */
  public static void build_buildEngi2(Builder builder) {
    if (builder.isAddBeanFor("BuildDesi2", DesEngi.class, Engi.class)) {
      MyFactory factory = builder.get(MyFactory.class);
      DesEngi bean = factory.buildEngi2();
      builder.register(bean, "BuildDesi2", DesEngi.class, Engi.class);
    }
  }