Add query for ssh 'no route to host' bug 1370496

63 hits in 10 days, check and gate, all failures.

This is a different fingerprint from bug 1349617
and actually shows up more often, but might be the
same root cause.

Change-Id: I3624c16741b1cf6403bd213c31939933a84c13db
Related-Bug: #1370496
Merge "Add query for ssh 'no route to host' bug 1370496"