GTPv2_Emulation: make sure g_uecups_conn_id is populated.

In function f_init, we activate altstep as_uecups_ind at the end of the
function. In as_uecups we use the template generator function
tr_UECUPS_RecvFrom_R(). In this function we use g_uecups_conn_id, which
is only populated when use_gtpu_daemon is set to true. When
use_gtpu_daemon is false g_uecups_conn_id will be <unbound>, which leads
into an error.

Related: OS#5760
Change-Id: Ifc2e8d9de13d5d183d6f052b2092c356ab4973d1
diff --git a/library/GTPv2_Emulation.ttcn b/library/GTPv2_Emulation.ttcn
index 5bb3b1e..ff6a60a 100644
--- a/library/GTPv2_Emulation.ttcn
+++ b/library/GTPv2_Emulation.ttcn
@@ -389,6 +389,8 @@
 		remPort := g_gtp2_cfg.gtpc_remote_port
 	}
 
+	g_uecups_conn_id := res.connId;
+
 	if (g_gtp2_cfg.use_gtpu_daemon) {
 		map(self:UECUPS, system:UECUPS);
 		res := UECUPS_CodecPort_CtrlFunct.f_IPL4_connect(UECUPS, mp_uecups_host, mp_uecups_port, "", -1, -1, { sctp := valueof(ts_SCTP) });
@@ -396,7 +398,6 @@
 			setverdict(fail, "Could not connect UECUPS socket, check your configuration");
 			testcase.stop;
 		}
-		g_uecups_conn_id := res.connId;
 
 		/* clear all tunnel state in the daemon at start */
 		f_uecups_xceive({reset_all_state := {}}, {reset_all_state_res:=?}, 30.0);