monitoring: time stamp without expiration

* Time stamps will not be deleted any more after 300 seconds.

Co-Authored-by: Peter Weber <[email protected]>

rero_ils/modules/utils.py

@@ -547,7 +547,9 @@ def set_timestamp(name, **kwargs):
     time_stamps[name]['time'] = utc_now
     for key, value in kwargs.items():
         time_stamps[name][key] = value
-    current_cache.set('timestamps', time_stamps)
+    if not current_cache.set(key='timestamps', value=time_stamps, timeout=0):
+        current_app.logger.warning(
+            f'Can not set time stamp for: {name}')
     return utc_now