cli.updater: Prevent immediate wake-ups.

Always wait at least 60 seconds between consecutive wake-ups. Avoids
spamming server and local logs with attempts in case of temporary issues
(ex: network).

caucase/cli.py

@@ -792,6 +792,7 @@ def updater(argv=None, until=utils.until):
     threshold = datetime.timedelta(args.threshold, 0)
     crl_threshold = datetime.timedelta(args.crl_threshold, 0)
     max_sleep = datetime.timedelta(args.max_sleep, 0)
+    min_sleep = datetime.timedelta(0, 60)
     updated = RetryingCaucaseClient.updateCAFile(
       cas_url,
       args.cas_ca,
@@ -892,6 +893,10 @@ def updater(argv=None, until=utils.until):
           next_deadline,
           crt.not_valid_after - threshold,
         )
+      next_deadline = max(
+        next_deadline,
+        now + min_sleep,
+      )
       if updated:
         if args.on_renew is not None:
           status = os.system(args.on_renew)