"haproxy" process referenced in example no longer part of release.

[kimago]

https://github.com/pivotal/cf-onboarding/blob/0f3bce81f68b52d4c6027611d8499a49df07e3ce/bosh_troubleshooting.prolific#L133

Tracker story "Update your BOSH deployment's properties (a.k.a. let's break some stuff)" reads:

Choose a spec property where you expect to be able to tell if the value changes. An example in haproxy might be cc.allow_app_ssh_access (read the property description in the spec to learn more).

That haproxy process is no longer part of release we're told -- it should be updated with something both "real" and also "easily traceable WRT impact of messing with it". (Note this is a tough story for us n00bs, so a solid example here is very helpful.)