Adding two failing tests which shows the json body error put/post

When either PUTing or POSTing a json body content.
There is a weird mismatch in the route code which leads to the body content not being read. (probably between path parameter and body stuff)
The proper class is instantiated (an Order class in the following test case), but the body content is not read and thus not applied to the class.
You always get a instance of the right class with no content.