Restart relay clients on "connection refused"
Restart relay clients on "connection refused"

We've got a set of relay client stuck in this state and restarting them
made them work again.
While this error denotes that the peer is refusing the connection and thus
it is not clear why this helps, it does not hurt either.

Change-Id: I13f4954abbd11c7992b4a7a064895face6ae598a
GitOrigin-RevId: ac85ec153397cd1b12d0af496b9b92b834305579

googlecloudrobotics/core,googlecloudrobotics/core,googlecloudrobotics/core