msc: use as_expect_clear() in f_tc_mt_t310()

This testcase is not Iu-compatible yet, but let's make life a bit
easier for those trying to make it such in the future.

Change-Id: I8185153502d31163fcb4c718690ee0f1cc912f5b
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 101d632..52a5c2f 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -1850,7 +1850,7 @@
 		// FIXME: f_create_mgcp_delete_ep(cpars.mgcp_ep);
 		repeat;
 		}
-	[] as_clear_cmd_compl_disc();
+	[] as_expect_clear() { setverdict(pass); }
 	}
 }
 testcase TC_mt_t310() runs on MTC_CT {