msc: TC_mt_t310: avoid sporadic failure from X2 timeout

Change-Id: Ic23cbca5775031dcb0ea1744454e20cda090701c
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 1767761..0490901 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -1766,6 +1766,10 @@
 
 	f_init_handler(pars);
 
+	/* Make sure X2 does not fire in this test. This test does not send a CN RTP port to osmo-msc, which will
+	 * trigger X2 timeout. We want to test T310, so make X2 significantly longer than T310=30s. */
+	f_vty_config(MSCVTY, "msc", "timer mgw X2 40");
+
 	/* Initiate a MT call, establish connection */
 	f_mt_call_start(cpars);