bscnat: Add missing setverdict(pass) at the end

Without this line, tests like TC_ctrl_location end up with verdict
"none".

Change-Id: I139a2ef63685b0f646fd9069031f92cf20eeca1e
diff --git a/bsc-nat/BSCNAT_Tests.ttcn b/bsc-nat/BSCNAT_Tests.ttcn
index e97eb83..41d58d7 100644
--- a/bsc-nat/BSCNAT_Tests.ttcn
+++ b/bsc-nat/BSCNAT_Tests.ttcn
@@ -192,6 +192,7 @@
 	for (i := 0; i < NUM_MSC; i := i+1) {
 		msc[i].MSC.stop;
 	}
+	setverdict(pass);
 }