Fix (and test) sending large messages over message_bridge

Brennan installed message_bridge and it didn't start.  Whops...  I added
a test to reproduce it too.

Change-Id: I54e3e76af5588760599445660876071be37440df
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/aos/network/sctp_server.h b/aos/network/sctp_server.h
index 1f7e2ee..800c2c1 100644
--- a/aos/network/sctp_server.h
+++ b/aos/network/sctp_server.h
@@ -57,7 +57,8 @@
   void SetStreamPriority(sctp_assoc_t assoc_id, int stream_id,
                          uint16_t priority);
 
-  void SetMaxSize(size_t max_size) { sctp_.SetMaxSize(max_size); }
+  void SetMaxReadSize(size_t max_size) { sctp_.SetMaxReadSize(max_size); }
+  void SetMaxWriteSize(size_t max_size) { sctp_.SetMaxWriteSize(max_size); }
 
   void SetPoolSize(size_t pool_size) { sctp_.SetPoolSize(pool_size); }