BSC_Tests_VAMOS: fix TC_vamos_multiplex_tch_h_tch_h_tch_h_tch_h

Properly clean up conns in the end. Use COORD and new COORD2 ports to
daisy-chain coordination between the four components.

Related: OS#5444
Change-Id: I3b1dfc3b11e990893cbf182fb9f8840e198eb8aa
diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index 4aeb539..109194b 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -447,6 +447,7 @@
 	port RAN_PROC_PT RAN;
 	port TELNETasp_PT BSCVTY;
 	port Coord_PT COORD;
+	port Coord_PT COORD2;
 
 	/* Proxy MGCP-over-IPA and MGCP-over-UDP */
 	port IPA_MGCP_PT MGCP_MSC_CLIENT;