Delete deprecated API versions

pkg/service:

There were a couple of references here just as a reminder to change the
behavior of findPort. As of v1beta3, TargetPort was always defaulted, so
we could remove findDefaultPort and related tests.

pkg/apiserver:

The tests were using versioned API codecs for some of their encoding
tests. Necessary API types had to be written and registered with the
fake versioned codecs.

pkg/kubectl:

Some tests were converted to current versions where it made sense.

examples/examples_test.go

@@ -121,7 +121,6 @@ func walkJSONFiles(inDir string, fn func(name, path string, data []byte)) error
 func TestExampleObjectSchemas(t *testing.T) {
 	cases := map[string]map[string]runtime.Object{
 		"../cmd/integration": {
-			"v1beta1-controller": &api.ReplicationController{},
 			"v1beta3-controller": &api.ReplicationController{},
 		},
 		"../examples/guestbook": {