[Feature] Minimal IUCLID export (#338)

This is an initial implementation that creates a working minimal .i6z document.
It passes schema validation and can be imported into IUCLID.

Caveat:
IUCLID files target individual compounds.
Pathway is not actually covered by the format.

It can be added in either soil or water and soil OECD endpoints.
**I currently only implemented the soil endpoint for all data.**

This sort of works, and I can report all degradation products in a pathway (not a nice view, but we can report many transformation products and add a diagram attachment in the future).

Adding additional information is an absolute pain, as we need to explicitly map each type of information to the relevant OECD field.
I use the XSD scheme for validation, but unfortunately the IUCLID parser is not fully compliant and requires a specific order, etc.

The workflow is: finding the AI structure from the XSD scheme -> make the scheme validation pass -> upload to IUCLID to get obscure error messages -> guess what could be wrong -> repeat 💣

New specifications get released once per year, so we will have to update accordingly.
I believe that this should be a more expensive feature, as it requires significant effort to uphold.

Currently implemented for root compound only in SOIL:

- Soil Texture 2
- Soil Texture 1
- pH value
- Half-life per soil sample / scenario (mapped to disappearance; not sure about that).
- CEC
- Organic Matter (only Carbon)
- Moisture content
- Humidity

<img width="2123" alt="image.png" src="attachments/d29830e1-65ef-4136-8939-1825e0959c62">
<img width="2124" alt="image.png" src="attachments/ac9de2ac-bf68-4ba4-b40b-82f810a9de93">
<img width="2139" alt="image.png" src="attachments/5674c7e6-865e-420e-974a-6b825b331e6c">

Reviewed-on: enviPath/enviPy#338
Co-authored-by: Tobias O <tobias.olenyi@envipath.com>
Co-committed-by: Tobias O <tobias.olenyi@envipath.com>

tests/views/test_user_views.py

@@ -1,3 +1,5 @@
+from urllib.parse import quote
+
 from django.conf import settings as s
 from django.test import TestCase, override_settings
 from django.urls import reverse
@@ -5,6 +7,13 @@ from django.urls import reverse
 from epdb.logic import PackageManager
 from epdb.models import Package, User
 
+_LOGIN_REQUIRED_MW = "epdb.middleware.login_required_middleware.LoginRequiredMiddleware"
+
+
+def _middleware_with_login_required():
+    mw = list(s.MIDDLEWARE)
+    return mw if _LOGIN_REQUIRED_MW in mw else [*mw, _LOGIN_REQUIRED_MW]
+
 
 @override_settings(MODEL_DIR=s.FIXTURE_DIRS[0] / "models", CELERY_TASK_ALWAYS_EAGER=True)
 class UserViewTest(TestCase):
@@ -39,6 +48,7 @@ class UserViewTest(TestCase):
         self.assertEqual(response.status_code, 200)
         self.assertFalse(response.wsgi_request.user.is_authenticated)
 
+    @override_settings(ADMIN_APPROVAL_REQUIRED=True)
     def test_register(self):
         response = self.client.post(
             reverse("register"),
@@ -51,7 +61,8 @@ class UserViewTest(TestCase):
         )
         self.assertEqual(response.status_code, 200)
         self.assertContains(
-            response, "Your account has been created! An admin will activate it soon!"
+            response,
+            "Your account has been created! An admin will activate it soon!",
         )
 
     def test_register_password_mismatch(self):
@@ -81,14 +92,19 @@ class UserViewTest(TestCase):
         )
         self.assertFalse(response.wsgi_request.user.is_authenticated)
 
+    @override_settings(MIDDLEWARE=_middleware_with_login_required())
     def test_next_param_properly_handled(self):
-        response = self.client.get(reverse("packages"))
-
-        self.assertRedirects(response, f"{reverse('login')}/?next=/package")
+        packages_url = reverse("packages")
+        response = self.client.get(packages_url)
+        self.assertRedirects(
+            response,
+            f"{s.LOGIN_URL}?next={quote(packages_url)}",
+            fetch_redirect_response=False,
+        )
 
         response = self.client.post(
             reverse("login"),
-            {"username": "user0", "password": "SuperSafe", "login": "true", "next": "/package"},
+            {"username": "user0", "password": "SuperSafe", "login": "true", "next": packages_url},
         )
 
-        self.assertRedirects(response, reverse("packages"))
+        self.assertRedirects(response, packages_url)