Accept port when creating route

Closes #4257

Author: uzabanov

api/payloads/route.go

@@ -13,6 +13,7 @@ import (
 type RouteCreate struct {
 	Host          string              `json:"host"`
 	Path          string              `json:"path"`
+	Port          int                 `json:"port"`
 	Relationships *RouteRelationships `json:"relationships"`
 	Metadata      Metadata            `json:"metadata"`
 }

api/payloads/route_test.go

@@ -97,6 +97,7 @@ var _ = Describe("RouteCreate", func() {
 		createPayload = payloads.RouteCreate{
 			Host: "h1",
 			Path: "p1",
+			Port: 8080,
 			Relationships: &payloads.RouteRelationships{
 				Domain: payloads.Relationship{
 					Data: &payloads.RelationshipData{