Order all keys in config (#8541)

New changes

- return default values when sub-sys is
  not configured.
- state is hidden parameter now
- remove worm mode to be saved in config

cmd/config/identity/ldap/help.go

@@ -21,11 +21,6 @@ import "github.com/minio/minio/cmd/config"
 // Help template for LDAP identity feature.
 var (
 	Help = config.HelpKVS{
-		config.HelpKV{
-			Key:         config.State,
-			Description: "Enable or disable LDAP/AD identity",
-			Type:        "on|off",
-		},
 		config.HelpKV{
 			Key:         ServerAddr,
 			Description: `AD/LDAP server address eg: "myldapserver.com:636"`,