many improvements with options and noop stuff

* add many options helpers
* fix noop client to allow publish messages to topic in broker
* fix noop server to allow registering in registry
* fix noop server to allow subscribe to topic in broker
* fix new service initialization

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

api/server/http/http.go

@@ -21,13 +21,8 @@ type httpServer struct {
 }
 
 func NewServer(address string, opts ...server.Option) server.Server {
-	var options server.Options
-	for _, o := range opts {
-		o(&options)
-	}
-
 	return &httpServer{
-		opts:    options,
+		opts:    server.NewOptions(opts...),
 		mux:     http.NewServeMux(),
 		address: address,
 		exit:    make(chan chan error),

api/server/options.go

@@ -21,6 +21,14 @@ type Options struct {
 	Wrappers     []Wrapper
 }
 
+func NewOptions(opts ...Option) Options {
+	options := Options{}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}
+
 type Wrapper func(h http.Handler) http.Handler
 
 func WrapHandler(w ...Wrapper) Option {