SEC-2844: Clarify reference guide in relation to AfterInvocationManager

[spring-projects-issues]

Jordi Llach Fernandez (Migrated from SEC-2844) said:

I think that user reference should make much clearer to the reader that FilterSecurityInterceptor would call AfterInvocationManager but this won't be able to modify the response. In fact this is very reasonable but I think that a mention about the different uses of AfterInvocationManager when 'decorating' a FilterSecurityInterceptor or MethodSecurityInterceptor would be valuable.

Refs from the guides :
http://docs.spring.io/spring-security/site/docs/3.2.5.RELEASE/reference/htmlsingle/#secure-objects
http://docs.spring.io/spring-security/site/docs/3.2.5.RELEASE/reference/htmlsingle/#afterinvocationmanager