Check home page status code in StatusCheckView

[symroe]

StatusCheckView will check if the server dirty flag is set, but will allow an instance in to the load balancer pool if a request to the home page is a 500.

The view should make a request to the home page (and maybe a person page) to make sure the status code is 200, as well as the existing check.

Because the site is served using a socket file, this will need to be done using https://github.com/msabramo/requests-unixsocket or somesuch.