GSUP client: send CN domain IE on LU request

Give the HLR a chance to send us updated subscriber data by indicating the CN
domain to be Circuit Switched, only during a LU Request GSUP message.

Adjust msc_vlr_tests to expect the added GSUP CN domain IE to indicate CS, i.e.
append '280102'.

Related: OS#3601
Change-Id: I0c2d33fbfdb4728e480679120d06b7f3a2ccfd76
diff --git a/tests/msc_vlr/msc_vlr_test_umts_authen.c b/tests/msc_vlr/msc_vlr_test_umts_authen.c
index 03f516f..62e280e 100644
--- a/tests/msc_vlr/msc_vlr_test_umts_authen.c
+++ b/tests/msc_vlr/msc_vlr_test_umts_authen.c
@@ -124,7 +124,7 @@
 
 	if (via_ran == RAN_GERAN_A) {
 		btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
-		gsup_expect_tx("04010809710000000156f0");
+		gsup_expect_tx("04010809710000000156f0280102");
 		ms_sends_msg("0554" "e229c19e" "2104" "791f2e41");
 		VERBOSE_ASSERT(gsup_tx_confirmed, == true, "%d");
 		VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
@@ -137,7 +137,7 @@
 		VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
 
 		btw("MS sends SecurityModeControl acceptance, VLR accepts and sends GSUP LU Req to HLR");
-		gsup_expect_tx("04010809710000000156f0");
+		gsup_expect_tx("04010809710000000156f0280102");
 		ms_sends_security_mode_complete();
 		VERBOSE_ASSERT(gsup_tx_confirmed, == true, "%d");
 		VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
@@ -493,7 +493,7 @@
 
 	if (via_ran == RAN_GERAN_A) {
 		btw("MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR");
-		gsup_expect_tx("04010809710000000156f0");
+		gsup_expect_tx("04010809710000000156f0280102");
 		ms_sends_msg("0554" "1df5f0b4" "2104" "f22b696e");
 		VERBOSE_ASSERT(gsup_tx_confirmed, == true, "%d");
 		VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
@@ -506,7 +506,7 @@
 		VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
 
 		btw("MS sends SecurityModeControl acceptance, VLR accepts and sends GSUP LU Req to HLR");
-		gsup_expect_tx("04010809710000000156f0");
+		gsup_expect_tx("04010809710000000156f0280102");
 		ms_sends_security_mode_complete();
 		VERBOSE_ASSERT(gsup_tx_confirmed, == true, "%d");
 		VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");