Fix the stack informer's selector used to track deployment

Old selector was wrong (it watched for the label we applied to child
resources when reconciling the stack, instead of the stack itself)

This should be back-ported to older version of the CLI

Signed-off-by: Simon Ferquel <simon.ferquel@docker.com>
(cherry picked from commit 8cd74eb33a)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: f89d05edcb
Component: cli

components/cli/cli/command/stack/kubernetes/watcher.go

@@ -10,6 +10,7 @@ import (
 	"github.com/pkg/errors"
 	apiv1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/runtime"
 	runtimeutil "k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/watch"
@@ -240,12 +241,12 @@ func newStackInformer(stacksClient stackListWatch, stackName string) cache.Share
 	return cache.NewSharedInformer(
 		&cache.ListWatch{
 			ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
-				options.LabelSelector = labels.SelectorForStack(stackName)
+				options.FieldSelector = fields.OneTermEqualSelector("metadata.name", stackName).String()
 				return stacksClient.List(options)
 			},
 
 			WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
-				options.LabelSelector = labels.SelectorForStack(stackName)
+				options.FieldSelector = fields.OneTermEqualSelector("metadata.name", stackName).String()
 				return stacksClient.Watch(options)
 			},
 		},