Added 401 to expected status codes on health check. 

This will allow for Basic Auth applications to work in scaled mode.

https://bugzilla.redhat.com/show_bug.cgi?id=1145810

We need to make this configurable:

```
option httpchk GET <%= ENV["OPENSHIFT_HAPROXY_CHECK_URL"] || "/" %>
http-check expect rstatus 2..|3..<%= ENV["OPENSHIFT_HAPROXY_CHECK_STATUS"] %>
```

Then you can do:

```
$ rhc env set OPENSHIFT_HAPROXY_CHECK_STATUS="401"
$ rhc cartridge restart haproxy
```