ONOS Swagger Plugin

just does swagger now
to build the plugin, you need to download to following:
https://github.com/bocon13/buck/releases/download/v2016.07.29.01-wip/buck.jar

put the buck.jar in tools/build/buck-plugin/lib

Change-Id: Id1b833dd013fbc5581f8e884e755920829c4a17e
diff --git a/.gitignore b/.gitignore
index bbc20cd..30c96d0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,6 +17,7 @@
 .buckd
 buck-out
 .buckconfig.local
+.buckjavaargs*
 
 core/store/trivial/data/
 core/store/apps