message: [network] improve error reporting during connect
  Currently, there isn't error reporting during repeated failures to
  connect to a server in the network lib, which makes debugging failures
  difficult.  The debug level message should prevent too much logging,
  while allowing us to debug issues. resolves
  Closes:
  Approved by: davidiw
diff: @@ -86,7 +86,8 @@ impl NetworkClient {
  let mut stream = TcpStream::connect(self.server);
  let sleeptime = time::Duration::from_millis(100);
  - while stream.is_err() {
  + while let Err(e) = stream {
  + debug!("Failed to connect to upstream {} {:?}", self.server, e);
  thread::sleep(sleeptime);
  stream = TcpStream::connect(self.server);
  }
  