[ce, ee] test errors get hidden by error page
When running tests the traceback is excepted away by the error handler page, this makes it difficult to debug since eg
will return a 500 error page instead of a traceback.
OTOH making tests always raise errors will then break the page that checks if the pretty error page is working as it should.
Need to add a dynamic setting, eg settings['use_error_document'] = False - that can be turned on/off at will and will disable the pretty error page handler for running tests.