hotfix: backend tests failing due to Nominatim server error:403

Causing to fail with requests.exceptions.HTTPError: 403 Client Error: Forbidden for url. Solved with appropriate User agent headers

backend/models/postgis/project.py

@@ -266,8 +266,15 @@ def set_country_info(self):
         url = "{0}/reverse?format=jsonv2&lat={1}&lon={2}&accept-language=en".format(
             current_app.config["OSM_NOMINATIM_SERVER_URL"], lat, lng
         )
+        headers = {
+            "User-Agent": (
+                "Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
+                "AppleWebKit/537.36 (KHTML, like Gecko) "
+                "Chrome/58.0.3029.110 Safari/537.3"
+            )
+        }
         try:
-            response = requests.get(url)
+            response = requests.get(url, headers=headers)
             response.raise_for_status()
             country_info = response.json()  # returns a dict
             if country_info["address"].get("country") is not None: