Added /description endpoint and StandardizedLiteralEnum

[alexgordtop]

I've added a generic /description endpoint, that is automatically added to the repository components.
In the http modules a *ServiceDescriptionConfiguration has to be implemented, that configures which Profiles are provided.

The Profiles use a modified Profile Enum from the registry projects, extended by an additional interface StandardizedLiteralEnum, which allows a simplified de-/serialization configuration for enums with custom serializations.

Known issues:

    SimpleModule module = new SimpleModule();
    module.addSerializer(StandardizedLiteralEnum.class, new StandardizedLiteralEnumSerializer<>());
    module.addDeserializer(Profile.class, new StandardizedLiteralEnumDeserializer<>(Profile.class));
    module.addSerializer(Enum.class, new EnumSerializer());
    ReflectionHelper.ENUMS.forEach(x -> module.addDeserializer(x, new EnumDeserializer<>(x)));

AAS4J introduced a reflection based serialization approach, which only works as the one and only solution. In combination which the other two serializers, it leads to infinite loops.