bsc: Fix test TC_rll_sapi_n_reject_dlci_cc expectancies

Cause GSM0808_CAUSE_MS_NOT_EQUIPPED is to be transmitted only in the case
BSC receives a RelInd from the MS/BTS. In this test, an ErrorInd is
sent, as in TC_rll_err_ind_sapi_n_reject, so it is expected that the
BSC will send the N_Reject message with cause
GSM0808_CAUSE_BSS_NOT_EQUIPPED.

Related: OS#4728
Related: SYS#5047
Fixes: 999ceb66373a93c0ab5adf14b313187789288c53
Change-Id: Ieebe3465b31d98fcae0e2c1993477c5021c99b3b
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 7bfc387..0dd4440 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -2591,7 +2591,7 @@
 
 	/* MS sends unexpected ERROR INDication on DCCH/ACCH SAPI=3 */
 	f_ipa_tx(0, ts_RSL_ERROR_IND(dt.rsl_chan_nr, ts_RslLinkID_DCCH(3), ''O));
-	f_exp_sapi_n_reject(3, GSM0808_CAUSE_MS_NOT_EQUIPPED, '10'B);
+	f_exp_sapi_n_reject(3, GSM0808_CAUSE_BSS_NOT_EQUIPPED, '10'B);
 
 	/* Clean up the connection */
 	BSSAP.send(ts_BSSAP_DISC_req(dt.sccp_conn_id, 0));