fix(shutdown): fix crash when shutting down before server and task scheduler have started. (#2148)

init shutdown routine after controller.Init()
check for nil values before stopping http server and task scheduler.

Signed-off-by: Petu Eusebiu <peusebiu@cisco.com>

pkg/cli/server/root.go

@@ -69,6 +69,8 @@ func newServeCmd(conf *config.Config) *cobra.Command {
 				return err
 			}
 
+			initShutDownRoutine(ctlr)
+
 			if err := ctlr.Run(); err != nil {
 				log.Error().Err(err).Msg("failed to start controller, exiting")
 			}