Always sleep while restarting

The /services/server/control/restart endpoint does not stop the API
immediately. As a result, a login() call may still succeed just before
the restart takes effect. This change introduces an additional sleep
to prevent a burst of requests from reaching the server while it is
in the process of restarting.

Author: mateusz834

splunklib/client.py

@@ -620,6 +620,7 @@ def restart(self, timeout=None):
                 self.login()
                 if not self.restart_required:
                     return result
+                sleep(1)
             except Exception as e:
                 sleep(1)
         raise Exception("Operation time out.")