Router should not print a stacktrace when a service is not discoverable

Description

Suppose that a user attempts to reach the HTTP endpoint of a user service, but the service is either not running or just not discoverable. CDAP Router will log the following stacktrace. This is too verbose, and likely, just a simple 1-line log line would suffice. Even that may be too verbose, and instead a metric should be incremented.

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Created February 9, 2017 at 8:08 AM
Updated June 15, 2020 at 11:56 PM