Adding test to assert that no Properties, PropertyTypes or PropertyGroups exists without an id when loaded from the db.
NOTE Changes signature of Member class as Email, Username and Password is required.
PropertyTypes and PropertyGroups are loaded as part of the MemberType in one go.
MemberTypeRepository uses the same approach as the ContentTypeRepository and MediaTypeRepository for saving/updating.
Refactoring how the 9-PropertyType convention is handled.
Refactoring the MemberTypeRepository to use the new MemberType class.
Starting the implementation of ReadOnly DTOs for MemberType.
Starting the implementation of the factory for the MemberTypeReadOnlyDto.