Updating test sources in several BUCK files

Change-Id: I17b83cb978f7b8fc1d31a1e96bec59a077dbdfbb
diff --git a/apps/vtn/BUCK b/apps/vtn/BUCK
index e653036..2b41c08 100644
--- a/apps/vtn/BUCK
+++ b/apps/vtn/BUCK
@@ -1,5 +1,5 @@
 SRC = 'src/main/java/org/onosproject/**/'
-TEST = 'src/main/java/org/onosproject/**/'
+TEST = 'src/test/java/org/onosproject/**/'
 
 COMPILE_DEPS = [
     '//lib:CORE_DEPS',