the backend shouldn't try to set a dynamic default value. Instead, the frontend will initialize it to an empty string, then evaluate a default value, then choose to set it. (Basically, move this function from the backend and put the burden on formly)
I've re-worked the workflow form endpoint, so that it only accepts the data that should be in the form, and ignores any other values that come back from the front end. It seems Formly has some bugs that were introducing confusing information, and I want everything to behave consistently.
I had to re-work some of the tests, which were relying on an ability to set data through a form post without having a corresponding form to do so.
