Add etcd part of config support, add noColor/json support (#8439)

- Add color/json mode support for get/help commands
- Support ENV help for all sub-systems
- Add support for etcd as part of config

cmd/iam-etcd-store.go

@@ -117,6 +117,7 @@ func (ies *IAMEtcdStore) loadIAMConfig(item interface{}, path string) error {
 	if err != nil {
 		return err
 	}
+
 	return json.Unmarshal(pdata, item)
 }