msc: do not execute TC_gsup_mt_sms_lu_delay against -latest

This patch fixes regressions in ttcn3-msc-test-latest caused by a
recently merged patch adding MSC_Tests.TC_gsup_mt_sms_lu_delay.

I was expecting it to fail early at this line:

  f_vty_config(MSCVTY, "msc", "timer geran X36 2500"); /* 2.5s */

since timer X36 is not available in the -latest yet.  But this
function executes just fine and the error response is simply ignored.

The -latest version of osmo-msc closes the A-connection early and
then tries to deliver a MT SMS while executing subsequent testcases.

Change-Id: I0b07076a054e30c5a9023de18f2c70f15c97f8cc
Fixes: 8d0d7af2 "msc: add TC_gsup_mt_sms_lu_delay for X36 (LU delay) timer"
Related: SYS#6913
---
M msc/MSC_Tests.ttcn
1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 3c707d1..898aeef 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -17,6 +17,7 @@
 
 import from General_Types all;
 import from Osmocom_Types all;
+import from Misc_Helpers all;
 import from GSM_Types all;
 
 import from M3UA_Types all;
@@ -7493,7 +7494,11 @@
 	execute( TC_gsup_mt_sms_rp_mr() );
 	execute( TC_gsup_mo_mt_sms_rp_mr() );
 	execute( TC_gsup_mt_multi_part_sms() );
-	execute( TC_gsup_mt_sms_lu_delay() );
+	if (Misc_Helpers.f_osmo_repo_is("nightly")) {
+		/* timer X36 is not supported by osmo-msc <= 1.11.1
+		 * Related: osmo-msc.git Ic519cab55d65e47b2636124427dab1a1d80fab78 */
+		execute( TC_gsup_mt_sms_lu_delay() );
+	}
 
 	execute( TC_lu_and_mo_ussd_single_request() );
 	execute( TC_lu_and_mt_ussd_notification() );

