Refactor buck external dependencies

Change-Id: Ia4b99493407eb7d4e893804cba6b944f758f085e
diff --git a/apps/packet-stats/BUCK b/apps/packet-stats/BUCK
index 560294b..e3cf58e 100644
--- a/apps/packet-stats/BUCK
+++ b/apps/packet-stats/BUCK
@@ -1,5 +1,7 @@
 COMPILE_DEPS = [
     '//lib:CORE_DEPS',
+    '//lib:JACKSON',
+    '//lib:METRICS',
     '//core/store/serializers:onos-core-serializers',
     '//core/store/primitives:onos-core-primitives',
     '//core/api:onos-api',