PCU_Tests_NS: Fix our expectations regarding CellID presence/absence

This is required by the spec, and implemented libosmocore since
Change-Id Ie87820537d6d616da4fd4bbf73eab06e28fda5e1

So let's change our test expectations.  Meanwhile, introduce
mp_tolerate_bvc_reset_cellid for working around the bug in 'latest'.

Change-Id: Icebee25b53fef623db6ae91ca0d943e70a3c86b7
diff --git a/pcu/PCU_Tests_NS.ttcn b/pcu/PCU_Tests_NS.ttcn
index 26b81a2..6a62f29 100644
--- a/pcu/PCU_Tests_NS.ttcn
+++ b/pcu/PCU_Tests_NS.ttcn
@@ -28,6 +28,11 @@
 import from PCUIF_CodecPort all;
 import from RAW_NS all;
 
+modulepar {
+	/* tolerate CellID absence/presence in BVC-RESET in violation to spec */
+	boolean mp_tolerate_bvc_reset_cellid := false;
+}
+
 type component RAW_PCU_CT {
 	/* PCUIF (we emulate the BTS part) */
 	port PCUIF_CODEC_PT PCU;
@@ -188,7 +193,11 @@
 	f_outgoing_ns_alive();
 
 	/* Expect BVC-RESET for signaling (0) and ptp BVCI */
-	as_rx_bvc_reset_tx_ack(0, mp_gb_cfg.cell_id, oneshot := true);
+	if (mp_tolerate_bvc_reset_cellid) {
+		as_rx_bvc_reset_tx_ack(0, mp_gb_cfg.cell_id, oneshot := true);
+	} else {
+		as_rx_bvc_reset_tx_ack(0, omit, oneshot := true);
+	}
 	as_rx_bvc_reset_tx_ack(mp_gb_cfg.bvci, mp_gb_cfg.cell_id, oneshot := true);
 	as_rx_bvc_unblock_tx_ack(mp_gb_cfg.bvci, oneshot := true);