Part 2 of plural ports: make endpoints a struct

Includes conversions for v1b[12] and tests and fixups for call sites.

pkg/kubectl/resource_printer_test.go

@@ -452,7 +452,7 @@ func TestPrinters(t *testing.T) {
 		"pod":             &api.Pod{ObjectMeta: om("pod")},
 		"emptyPodList":    &api.PodList{},
 		"nonEmptyPodList": &api.PodList{Items: []api.Pod{{}}},
-		"endpoints":       &api.Endpoints{Endpoints: []string{"127.0.0.1", "localhost:8080"}},
+		"endpoints":       &api.Endpoints{Endpoints: []api.Endpoint{{IP: "127.0.0.1"}, {IP: "localhost", Port: 8080}}},
 	}
 	// map of printer name to set of objects it should fail on.
 	expectedErrors := map[string]util.StringSet{