Rename type Port to ContainerPort

Sadly I had to do this by hand - I just could not get gorename to fix up
users of it.

test/e2e/service.go

@@ -296,7 +296,7 @@ func addEndpointPodOrFail(c *client.Client, ns, name string, labels map[string]s
 				{
 					Name:  "test",
 					Image: "kubernetes/pause",
-					Ports: []api.Port{{ContainerPort: 80}},
+					Ports: []api.ContainerPort{{ContainerPort: 80}},
 				},
 			},
 		},