Add global flags to all commands and subcommands (#2605)

cmd/control-heal-main.go

@@ -29,12 +29,17 @@ var healCmd = cli.Command{
 	Name:   "heal",
 	Usage:  "To heal objects.",
 	Action: healControl,
+	Flags:  globalFlags,
 	CustomHelpTemplate: `NAME:
   minio control {{.Name}} - {{.Usage}}
 
 USAGE:
   minio control {{.Name}}
 
+FLAGS:
+  {{range .Flags}}{{.}}
+  {{end}}
+
 EXAMPLES:
   1. Heal an object.
      $ minio control {{.Name}} http://localhost:9000/songs/classical/western/piano.mp3