Set OwnerReferences to K8s resources created by Fission (#2964)

* Poolmanager deployment is created based on environment.
Set environment as owner to poolmanager deployment.

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

* Set OwnerReferences to K8s resources created by fission resources.
```
Set OwnerReferences to deployment, service and HPA created by newdeploy function.
Set OwnerReferences to builderManager deployment and service created by environment.
Set OwnerReferences to deployment, service and HPA created by container function.
```

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

* Use ControllerRef

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

---------

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

pkg/buildermgr/envwatcher.go

@@ -28,6 +28,7 @@ import (
 	apiv1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/intstr"
 	"k8s.io/client-go/kubernetes"
@@ -329,6 +330,13 @@ func (envw *environmentWatcher) createBuilderService(ctx context.Context, env *f
 			Namespace: ns,
 			Name:      name,
 			Labels:    sel,
+			OwnerReferences: []metav1.OwnerReference{
+				*metav1.NewControllerRef(env, schema.GroupVersionKind{
+					Group:   "fission.io",
+					Version: "v1",
+					Kind:    "Environment",
+				}),
+			},
 		},
 		Spec: apiv1.ServiceSpec{
 			Selector: sel,
@@ -440,6 +448,13 @@ func (envw *environmentWatcher) createBuilderDeployment(ctx context.Context, env
 			Namespace: ns,
 			Name:      name,
 			Labels:    sel,
+			OwnerReferences: []metav1.OwnerReference{
+				*metav1.NewControllerRef(env, schema.GroupVersionKind{
+					Group:   "fission.io",
+					Version: "v1",
+					Kind:    "Environment",
+				}),
+			},
 		},
 		Spec: appsv1.DeploymentSpec{
 			Replicas: &replicas,