#138 WIP Improvements

* adds geom back writing to form field in case of invalid geometry, so the invalid geometry will be shown again
* updates tests
* fixes bug where race condition of celery workers could lead to duplicates in parcels (needs migration)

intervention/tests/test_workflow.py

@@ -46,6 +46,7 @@ class InterventionWorkflowTestCase(BaseWorkflowTestCase):
         test_id = self.create_dummy_string()
         test_title = self.create_dummy_string()
         test_geom = self.create_dummy_geometry()
+        geom_json = self.create_geojson(test_geom)
 
         new_url = reverse("intervention:new", args=())
 
@@ -59,7 +60,7 @@ class InterventionWorkflowTestCase(BaseWorkflowTestCase):
         post_data = {
             "identifier": test_id,
             "title": test_title,
-            "geom": test_geom.geojson,
+            "geom": geom_json,
         }
         response = self.client_user.post(
             new_url,