When the periodic advertise fails continuously, we should kill the process

[prashantv]

We saw an issue where the peer list was polluted with non-Hyperbahn peers (#464) and the periodic advertise kept failing, but the process stayed up.

At this point the process was hosed since all calls were failing. If some K advertises fail in a row, it probably means we should stop receiving requests.

Here is tchannel-go's implementation:
https://github.com/uber/tchannel-go/blob/dev/hyperbahn/advertise.go#L31

If we get 5 consecutive failures, we will fatal (unless the user sets a custom FailStrategy, the default is to fatal).