Polish ViewResolversBeanDefinitionParser
Consistent default order for composite ViewResolver

The MVC Java config and namespace now have a consistent default order
or lowest precedence.
Add order attribute to MVC ViewResolver config

The ViewResolverComposite that contains the ViewResolver's registered
throug the MVC Java config and namespace can now be assigned an
explicit order.
Clean up MessageBrokerConfigurationTests

 - clean up warnings
 - simplify ApplicationContext configuration