fix review problems

config_center/apollo/impl.go

@@ -129,10 +129,6 @@ func (c *apolloConfiguration) GetRule(key string, opts ...Option) (string, error
 }
 
 func (c *apolloConfiguration) GetProperties(key string, opts ...Option) (string, error) {
-	k := &Options{}
-	for _, opt := range opts {
-		opt(k)
-	}
 	/**
 	 * when group is not null, we are getting startup configs(config file) from Config Center, for example:
 	 * key=dubbo.propertie

config_center/dynamic_configuration.go

@@ -36,8 +36,13 @@ type DynamicConfiguration interface {
 	SetParser(parser.ConfigurationParser)
 	AddListener(string, ConfigurationListener, ...Option)
 	RemoveListener(string, ConfigurationListener, ...Option)
+	//GetProperties get properties file
 	GetProperties(string, ...Option) (string, error)
+
+	//GetRule get Router rule properties file
 	GetRule(string, ...Option) (string, error)
+
+	//GetInternalProperty get value by key in Default properties file(dubbo.properties)
 	GetInternalProperty(string, ...Option) (string, error)
 }