Fixing broken tests.

Author: rhysrevans3

stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/database_logic.py

@@ -483,6 +483,8 @@ def apply_datetime_filter(search: Search, datetime_search):
 
         search = search.query(Q("bool", filter=[Q("bool", should=should)]))
 
+        return search
+
     @staticmethod
     def apply_bbox_filter(search: Search, bbox: List):
         """Filter search results based on bounding box.