Add baggageclaim monit restart when healthcheck fails

[kcmannem]

The monit config for the baggageclaim job relies on a pid file to ensure the job is alive. This can lead to false positives in determining a healthy system (ran into a scenario where baggageclaim's stderr logs 2018/10/11 20:32:16 http: Accept error: accept tcp 0.0.0.0:7788: accept4: too many open files; retrying in 5ms and closes its socket but monit lists the process as running).

We might want to consider giving monit a health endpoint so it can successfully handle the lifecycle. Here is an example from the UAA-Release.

      if failed port <%= active_uaa_port %> protocol http
        request "/healthz"
        with timeout 60 seconds for 64 cycles
      then restart