MockMvc Test Support

[rwinch]

I'm not sure exactly what we will need for this, but we should provide MockMvc support. One thing that is likely needed is the ability to easily create Authentication objects

[jzheaux]

What has been added so far is a set of request post processors for adding the bearer token to the Authorization header: https://github.com/jzheaux/spring-security-oauth2-resource-server/blob/master/samples/boot/oauth2/utilities/src/main/java/support/ResourceServerMockMvcRequestPostProcessors.java