ggsn: Fix TC_addr_pool_exhaustion not answering Gy CCR termination

Change-Id: If126840001b1e10d3dee86d678e624a0584337e8
diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index 7f6f67c..7418638 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -2157,6 +2157,7 @@
 		T_next.start;
 		alt {
 		[Gx_PROC.checkstate("Connected")] as_DIA_Gx_CCR(TERMINATION_REQUEST) { repeat; }
+		[Gy_PROC.checkstate("Connected")] as_DIA_Gy_CCR(TERMINATION_REQUEST) { repeat; }
 		[] pingpong();
 		[] T_next.timeout {
 			f_send_gtpc(ts_GTPC_DeletePDP(g_peer_c, g_c_seq_nr, teic_list[next_req_ctx], '0001'B, '1'B));