cache: fix closing too early (#791)

* cache: fix closing too early

* fix test

internal/cmd/pomerium/pomerium.go

@@ -160,7 +160,6 @@ func setupCache(opt *config.Options, controlPlane *controlplane.Server) error {
 	if err != nil {
 		return fmt.Errorf("error creating config service: %w", err)
 	}
-	defer svc.Close()
 	pbCache.RegisterCacheServer(controlPlane.GRPCServer, svc)
 	log.Info().Msg("enabled cache service")
 	return nil

internal/controlplane/xds_listeners_test.go

@@ -274,7 +274,8 @@ func Test_buildMainHTTPConnectionManagerFilter(t *testing.T) {
 							}
 						]
 					}
-				]
+				],
+				"validateClusters": false
 			},
 			"statPrefix": "ingress",
 			"tracing": {