Add storage name to healthcheck output on Praefect

Problem to solve

When looking at the health check output, we couldn't work out which node was which because the output only included IP addresses. It would be much easier to read the logs if the storage name was also included.

Proposal

Add the storage name to the healthcheck output on Preafect

The current output looks like:

{"address":"tcp://10.128.0.172:8075","error":"rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: connection error: desc = \"transport: Error while dialing dial tcp 10.128.0.172:8075: connect: connection refused\"","level":"warning","msg":"error when pinging healthcheck","pid":16020,"time":"2020-02-26T00:02:29Z"}

Links / references