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/storageclass/help.go

@@ -21,11 +21,6 @@ import "github.com/minio/minio/cmd/config"
 // Help template for storageclass feature.
 var (
 	Help = config.HelpKVS{
-		config.HelpKV{
-			Key:         config.State,
-			Description: "Indicates if storageclass is enabled or not",
-			Type:        "on|off",
-		},
 		config.HelpKV{
 			Key:         ClassRRS,
 			Description: `Set reduced redundancy storage class parity ratio. eg: "EC:2"`,

cmd/config/storageclass/legacy.go

@@ -27,8 +27,17 @@ func SetStorageClass(s config.Config, cfg Config) {
 		return
 	}
 	s[config.StorageClassSubSys][config.Default] = config.KVS{
-		ClassStandard: cfg.Standard.String(),
-		ClassRRS:      cfg.RRS.String(),
-		config.State:  config.StateOn,
+		config.KV{
+			Key:   ClassStandard,
+			Value: cfg.Standard.String(),
+		},
+		config.KV{
+			Key:   ClassRRS,
+			Value: cfg.RRS.String(),
+		},
+		config.KV{
+			Key:   config.State,
+			Value: config.StateOn,
+		},
 	}
 }

cmd/config/storageclass/storage-class.go

@@ -59,10 +59,18 @@ const (
 // DefaultKVS - default storage class config
 var (
 	DefaultKVS = config.KVS{
-		config.State:   config.StateOff,
-		config.Comment: "This is a default StorageClass configuration, only applicable in erasure coded setups",
-		ClassStandard:  "",
-		ClassRRS:       "EC:2",
+		config.KV{
+			Key:   config.State,
+			Value: config.StateOff,
+		},
+		config.KV{
+			Key:   ClassStandard,
+			Value: "",
+		},
+		config.KV{
+			Key:   ClassRRS,
+			Value: "EC:2",
+		},
 	}
 )