GSUP_Emulation: Update internal tables to allow 256 sessions

Other Emulations like GTPv2 and DIAMETER already support that number of
sessions. Increase it to the same number in GSUP_Emulation to allow
handling a high amount of concurrent sessions while testing ePDG.

Change-Id: I9ce650140fc372debc85b603a20bbe9ea165c972
diff --git a/library/GSUP_Emulation.ttcn b/library/GSUP_Emulation.ttcn
index 5e15d06..4f7e5d6 100644
--- a/library/GSUP_Emulation.ttcn
+++ b/library/GSUP_Emulation.ttcn
@@ -60,11 +60,10 @@
 	/* GSUP port to the per-connection clients */
 	port GSUP_Conn_PT GSUP_CLIENT;
 
-	/* use 16 as this is also the number of SCCP connections that SCCP_Emulation can handle */
-	var ConnectionData GsupImsiTable[16];
+	var ConnectionData GsupImsiTable[256];
 
 	/* pending expected incoming connections */
-	var ExpectData GsupExpectTable[16];
+	var ExpectData GsupExpectTable[256];
 	/* procedure based port to register for incoming connections */
 	port GSUPEM_PROC_PT GSUP_PROC;
 };