Add namespace file with build tag for OSS gateway tests (#16590)

* Add namespace file with build tag for OSS tests

* Remove TODO comment

test/integration/consul-container/test/gateways/gateway_endpoint_test.go

@@ -83,10 +83,11 @@ func TestAPIGatewayCreate(t *testing.T) {
 	// Create a client proxy instance with the server as an upstream
 	_, gatewayService := createServices(t, cluster, listenerPortOne)
 
-	//make sure the gateway/route come online
-	//make sure config entries have been properly created
-	checkGatewayConfigEntry(t, client, "api-gateway", "")
-	checkTCPRouteConfigEntry(t, client, "api-gateway-route", "")
+	// make sure the gateway/route come online
+	// make sure config entries have been properly created
+	namespace := getNamespace()
+	checkGatewayConfigEntry(t, client, "api-gateway", namespace)
+	checkTCPRouteConfigEntry(t, client, "api-gateway-route", namespace)
 
 	port, err := gatewayService.GetPort(listenerPortOne)
 	require.NoError(t, err)

test/integration/consul-container/test/gateways/http_route_test.go

@@ -5,21 +5,19 @@ import (
 	"crypto/rand"
 	"encoding/hex"
 	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
 	"github.com/hashicorp/consul/api"
 	libassert "github.com/hashicorp/consul/test/integration/consul-container/libs/assert"
 	libcluster "github.com/hashicorp/consul/test/integration/consul-container/libs/cluster"
 	libservice "github.com/hashicorp/consul/test/integration/consul-container/libs/service"
 	libtopology "github.com/hashicorp/consul/test/integration/consul-container/libs/topology"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-	"testing"
-	"time"
 )
 
-func getNamespace() string {
-	return ""
-}
-
 // randomName generates a random name of n length with the provided
 // prefix. If prefix is omitted, the then entire name is random char.
 func randomName(prefix string, n int) string {
@@ -80,7 +78,6 @@ func TestHTTPRouteFlattening(t *testing.T) {
 	},
 	)
 
-	//TODO this should only matter in consul enterprise I believe?
 	namespace := getNamespace()
 	gatewayName := randomName("gw", 16)
 	routeOneName := randomName("route", 16)

test/integration/consul-container/test/gateways/namespace_oss.go

@@ -0,0 +1,8 @@
+//go:build !consulent
+// +build !consulent
+
+package gateways
+
+func getNamespace() string {
+	return ""
+}