Touch-ups to patchpanel app, including adding to Buck build.

Change-Id: I212a575d50f3a38dea83b9ebe0c004b6267b0cbf
diff --git a/modules.defs b/modules.defs
index 22b7adf..4fca095 100644
--- a/modules.defs
+++ b/modules.defs
@@ -150,6 +150,7 @@
     '//apps/cpman/app:onos-apps-cpman-app-oar',
     '//apps/xosclient:onos-apps-xosclient-oar',
     '//apps/scalablegateway:onos-apps-scalablegateway-oar',
+    '//apps/patchpanel:onos-apps-patchpanel-oar',
 ]
 
 APP_JARS = [