Relax message bridge disconnected timeouts

When things are struggling or a large message is being transfered,
they are a bit tight.

Change-Id: I2334c3972339dec3eccc475793cdbc691c8fc2a6
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/aos/network/message_bridge_test.cc b/aos/network/message_bridge_test.cc
index 74d22c2..2a43170 100644
--- a/aos/network/message_bridge_test.cc
+++ b/aos/network/message_bridge_test.cc
@@ -773,7 +773,8 @@
     StopPi2Client();
   }
 
-  std::this_thread::sleep_for(std::chrono::seconds(2));
+  std::this_thread::sleep_for(SctpClientConnection::kReconnectTimeout +
+                              std::chrono::seconds(1));
 
   {
     // Now confirm we are un-synchronized.