DATACMNS-330, DATACMNS-331 - Improved web configuration support.

Updated backing implementation of @EnableSpringDataWebSupport to use WebMvcConfigurerAdapter instead of WebMvcConfigurationSupport as the latter is a very custom beast in terms of configuration. Let the Spring HATEOAS specific configuration class extend the default one to register additional components. The default one accesses the FormattingConversionService through a qualified autowiring. It issues a warning in case none has been configured and asks the user to enable Spring MVC.

Updated Sonargraph architecture description to allow logging from web config layer.