[CORD-544] Adds VPWS extensions in Loxi

Changes:
- Adds VPWS actions in Loxi;
- Adds VPWS OXMs in Loxi;
- Improves .gitignore;

Change-Id: I266702148bbed99cc8c91e2cb00b0b556018814e
diff --git a/.gitignore b/.gitignore
index f4243d4..1a13c65 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,4 @@
 /bin
 *,cover
 /.coverage
+*.iml