Tweaking mongoclient for testing

src/backend/utils.py

 from django.conf import settings
 from pymongo import MongoClient
 
-if settings.TESTING == "False":
+if settings.TESTING == "True":
+    lrs_db = None
+else:
     lrs_db_client = MongoClient(settings.LRS_CONNECTION_STRING)
     lrs_db = lrs_db_client[settings.LRS_MONGO_DB_NAME]