cmd/start: Include the version in the outgoing log line

Lala wanted the version included in the outgoing log line [1].  I'm
not sure why you'd be wondering which version of the CVO code was
running for that particular line, and not for other lines in the log,
but including the version there is easy enough.

While we're thinking about logging the CVO version, also remove the
useless %s formatting from the opening log line, because we don't need
to manipulate version.String at all.

[1]: #424 (comment)

Author: wking

cmd/start.go

@@ -18,12 +18,12 @@ func init() {
 		Long:  "",
 		Run: func(cmd *cobra.Command, args []string) {
 			// To help debugging, immediately log version
-			klog.Infof("%s", version.String)
+			klog.Info(version.String)
 
 			if err := opts.Run(context.Background()); err != nil {
 				klog.Fatalf("error: %v", err)
 			}
-			klog.Info("Graceful shutdown complete.")
+			klog.Infof("Graceful shutdown complete for %s.", version.String)
 		},
 	}