The healthcheck endpoint currently is not configured by us, which
means that it's pretty much a no-op right now.
It also causes issues with IPv6 addresses, where it fails to parse
the IP correctly and raises an exception.
ValueError: invalid literal for int() with
base 10: 'xxxx❌x::xx]:9292'
This patch goes back to monitoring the root of the endpoint as that
probably delivers just as accurate of information in the current
state that we're in.
Change-Id: I859795307b88508dc1b894b39526f4289b33c1af
6520d0bb2c