fix: improve logs from the trace writer (#800)
fix: improve logs from the trace writer (#800)

Adds hostnames to error messages coming from the Trace Writer. It also changes one error message to not print "status code unknown" (this is misleading because unknown actually means an error was thrown when making an outgoing request).
googleapis/cloud-trace-nodejs,googleapis/cloud-trace-nodejs,googleapis/cloud-trace-nodejs,googleapis/cloud-trace-nodejs