Update go-restful dependency

vendor/github.com/emicklei/go-restful-swagger12/swagger_builder.go

@@ -0,0 +1,21 @@
+package swagger
+
+type SwaggerBuilder struct {
+	SwaggerService
+}
+
+func NewSwaggerBuilder(config Config) *SwaggerBuilder {
+	return &SwaggerBuilder{*newSwaggerService(config)}
+}
+
+func (sb SwaggerBuilder) ProduceListing() ResourceListing {
+	return sb.SwaggerService.produceListing()
+}
+
+func (sb SwaggerBuilder) ProduceAllDeclarations() map[string]ApiDeclaration {
+	return sb.SwaggerService.produceAllDeclarations()
+}
+
+func (sb SwaggerBuilder) ProduceDeclarations(route string) (*ApiDeclaration, bool) {
+	return sb.SwaggerService.produceDeclarations(route)
+}