db: lower a warning statement to an info

swh/core/db/db_utils.py

@@ -270,7 +270,7 @@ def swh_set_db_module(
     current_module = swh_db_module(db_or_conninfo)
     if current_module is not None:
         if current_module == module:
-            logger.warning("The database module is already set to %s", module)
+            logger.info("The database module is already set to %s", module)
             return
 
         if not force: