Added git ignore and review configs

Change-Id: If8b4e0d9820bd2f855faa5abed6cb6370a772472
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..17a878d
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,5 @@
+[gerrit]
+host=gerrit.onosproject.org
+project=vtn.git
+defaultremote=origin
+defaultbranch=master