GPRS_Components: rename 'GprsMSArray' to 'GprsMSList'

In TTCN-3, array assumes a fixed number of elements.  A 'record of'
type is more like a 'list' in Python, so let's call it this way.

Change-Id: Ib7df7efaa28a53a45d981d1c99f9eb1ac26fd91c
diff --git a/pcu/GPRS_Components.ttcn b/pcu/GPRS_Components.ttcn
index c860af5..4b4e2a0 100644
--- a/pcu/GPRS_Components.ttcn
+++ b/pcu/GPRS_Components.ttcn
@@ -113,7 +113,7 @@
 	UlTbf		ul_tbf optional, /* TODO: Only 1 UL tbf supported for now */
 	DlTbf		dl_tbf optional /* TODO: Only 1 DL tbf supported for now */
 };
-type record of GprsMS GprsMSArray;
+type record of GprsMS GprsMSList;
 
 template AckNackDescription t_AckNackDescription_init := {
 	final_ack := '0'B,
@@ -163,7 +163,7 @@
 	port RAW_PCU_MSG_PT BTS;
 
 	/* Mobile station(s) involved in a testing scenario */
-	var GprsMSArray g_ms := { };
+	var GprsMSList g_ms := { };
 
 	/* Value at which Countdown Procedure starts. Announced by network (GPRS Cell Options as per TS 04.60 Chapter 12.24) */
 	var uint4_t g_bs_cv_max := 4;