GTPv2_Emulation: Increase reset_all_stats timeout

Release of 256 tuns + threads takes quite a reasonable amount of time.
Let's increase the timeout since reset_all_state can take around 10
seconds sometimes.

Related: OS#5523
Change-Id: Ie01e07bd698cb5c386f757f4ec315f4892ad61cb
diff --git a/library/GTPv2_Emulation.ttcn b/library/GTPv2_Emulation.ttcn
index f07afcb..5bb3b1e 100644
--- a/library/GTPv2_Emulation.ttcn
+++ b/library/GTPv2_Emulation.ttcn
@@ -353,9 +353,9 @@
 }
 
 private function f_uecups_xceive(template (value) PDU_UECUPS tx,
-				template PDU_UECUPS rx_t := ?)
+				template PDU_UECUPS rx_t := ?, float time_out := 10.0)
 runs on GTPv2_Emulation_CT  return PDU_UECUPS {
-	timer T := 10.0;
+	timer T := time_out;
 	var UECUPS_RecvFrom mrf;
 
 	UECUPS.send(t_UECUPS_Send(g_uecups_conn_id, tx));
@@ -399,7 +399,7 @@
 		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:=?});
+		f_uecups_xceive({reset_all_state := {}}, {reset_all_state_res:=?}, 30.0);
 	}
 
 	/* make sure we always pass incoming UECUPS indications whenever receiving fom the UECUPS port */