msc: fix log typo in f_tc_cmserv_imsi_unknown()

Change-Id: If7aa20cd7fea81107f3748251070c32bb08f1f4e
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index d668616..63e90f4 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -658,7 +658,7 @@
 		mtc.stop;
 		}
 	[] T.timeout {
-		setverdict(fail, "Timeout waiting for CM SERV REQ");
+		setverdict(fail, "Timeout waiting for CM SERV REJ");
 		mtc.stop;
 		}
 	}