Fix tests to support ObjectMeta omitempty semantics

pkg/kubectl/cmd/testdata/edit/testcase-create-list-error/1.request

@@ -8,7 +8,6 @@
 		},
 		"name": "svc1",
 		"namespace": "edit-test",
-		"resourceVersion": "",
 		"selfLink": "/api/v1/namespaces/edit-test/services/svc1",
 		"uid": "4149f70e-e9dc-11e6-8c3b-acbc32c1ca87"
 	},

pkg/kubectl/cmd/testdata/edit/testcase-create-list-error/3.request

@@ -8,7 +8,6 @@
 		},
 		"name": "svc2",
 		"namespace": "edit-test",
-		"resourceVersion": "",
 		"selfLink": "/api/v1/namespaces/edit-test/services/svc2",
 		"uid": "3e9b10db-e9dc-11e6-8c3b-acbc32c1ca87"
 	},

pkg/kubectl/cmd/testdata/edit/testcase-unknown-field-known-group-kind/2.request

@@ -2,8 +2,7 @@
 	"metadata": {
 		"labels": {
 			"label2": "value2"
-		},
-		"namespace": ""
+		}
 	},
 	"unknownClientField": {
 		"clientdata": true

pkg/kubectl/cmd/testdata/edit/testcase-unknown-version-known-group-kind/2.request

@@ -5,7 +5,6 @@
 	"metadata": {
 		"labels": {
 			"label2": "value2"
-		},
-		"namespace": ""
+		}
 	}
 }

staging/src/k8s.io/apiserver/pkg/registry/generic/registry/dryrun_test.go

@@ -215,7 +215,7 @@ func TestDryRunUpdateReturnsObject(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Failed to dry-run update: %v", err)
 	}
-	out = UnstructuredOrDie(`{"field": "value", "kind": "Pod", "metadata": {"resourceVersion": "2", "selfLink": ""}}`)
+	out = UnstructuredOrDie(`{"field": "value", "kind": "Pod", "metadata": {"resourceVersion": "2"}}`)
 	if !reflect.DeepEqual(obj, out) {
 		t.Fatalf("Returned object %#v different from expected %#v", obj, out)
 	}
@@ -268,7 +268,7 @@ func TestDryRunDeleteReturnsObject(t *testing.T) {
 	}
 
 	out = UnstructuredOrDie(`{}`)
-	expected := UnstructuredOrDie(`{"kind": "Pod", "metadata": {"resourceVersion": "2", "selfLink": ""}}`)
+	expected := UnstructuredOrDie(`{"kind": "Pod", "metadata": {"resourceVersion": "2"}}`)
 	err = s.Delete(context.Background(), "key", out, nil, true)
 	if err != nil {
 		t.Fatalf("Failed to delete with valid precondition: %v", err)