bsc: add Coord_PT to communicate between components

This is used by upcoming BSC_Tests.TC_cm_reestablishment().

Related: SYS#5130
Change-Id: I093ca7f66a3106a75e409ad8ea03e7db3c3cb165

bsc/MSC_ConnectionHandler.ttcn

@@ -431,6 +431,11 @@ altstep as_Media() runs on MSC_ConnHdlr {
 	[] as_Media_mgw();
 }
 
+type port Coord_PT message
+{
+	inout charstring;
+} with { extension "internal" };
+
 /* this component represents a single subscriber connection at the MSC.
  * There is a 1:1 mapping between SCCP connections and RAN_ConnHdlr components.
  * We inherit all component variables, ports, functions, ... from RAN_ConnHdlr */
@@ -441,6 +446,7 @@ type component MSC_ConnHdlr extends RAN_ConnHdlr, RSL_DchanHdlr, MGCP_ConnHdlr,
 	/* procedure port back to our parent (RAN_Emulation_CT) for control */
 	port RAN_PROC_PT RAN;
 	port TELNETasp_PT BSCVTY;
+	port Coord_PT COORD;
 
 	/* Proxy MGCP-over-IPA and MGCP-over-UDP */
 	port IPA_MGCP_PT MGCP_MSC_CLIENT;