Why using a not found URL when passing input by reference

[gfenoy]

Describe the bug
To pass the ValidInputDataTranmissionByReference test, it is required that IUT supports 404 as an acceptable status code when downloading a reference. Indeed, the file used as a template (https://github.com/opengeospatial/ets-wps20/blob/main/src/main/resources/org/opengis/cite/wps20/examples/ValidInputReference.xml) to provide an input by reference uses an URL which return 404.

To Reproduce
Run the ETS.

Expected behavior
Using a found URL (200) as reference for testing execution properly.
In case the input reference returns a 404, I think that the IUT should return an exception with a 400 status code.

[ghobona]

@gfenoy We will change the URL in the example to reference an XML document that exists.