fix: spid-sp-test exit code in CI

[peppelinux]

This PR fails CI if at least one check of spid-sp-test will fail

[brunato]

Maybe can be fixed extracting the ID from self.request (if it's not None) and providing in_response_to=<requestID> to Saml2ResponseValidator (otherwise provide in_response_to=''):

spid-django/src/djangosaml2_spid/views.py

Lines 319 to 333 in 723b558

	class AssertionConsumerServiceView(djangosaml2_views.AssertionConsumerServiceView):
	def custom_validation(self, response):
	conf = get_config(None, self.request)
	# Spid and SAML2 additional tests
	accepted_time_diff = conf.accepted_time_diff
	recipient = conf._sp_endpoints['assertion_consumer_service'][0][0]
	authn_context_classref = settings.SPID_AUTH_CONTEXT
	validator = Saml2ResponseValidator(authn_response=response.xmlstr,
	recipient=recipient,
	accepted_time_diff=accepted_time_diff,
	authn_context_class_ref=authn_context_classref,
	return_addrs=response.return_addrs)
	validator.run()

[peppelinux]

I think that the related saml2 request should be fetched from the outstanding cache, linked to djangosaml2 saml_session.
that's the place where we have all the related request in the user session

[peppelinux]

This test still fails, the requests that makes the response is cookie-naive :)
That's why I'd look in this direction:
IdentityPython/djangosaml2#275

but it's only an option, let's see :)