Release neutron-vpnaas for Ussuri

RC1 release for neutron-vpnaas. Please +1 if things are
ready to go, or -1 if the team needs a little more
time. If so, please update this patch with the new
commit hash to use when ready.

If no response, this patch will be approved soon
after the April 23 deadline.

Change-Id: I86bc0d9fb906268456f1eb2b840221cfd0d46338
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

deliverables/ussuri/neutron-vpnaas.yaml

@@ -11,3 +11,10 @@ releases:
     projects:
       - repo: openstack/neutron-vpnaas
         hash: 94ef8f9ffcb1ddfbd607bf97767f8eda2ff4b9ae
+  - version: 16.0.0.0rc1
+    projects:
+      - repo: openstack/neutron-vpnaas
+        hash: c3c2145fa64e9b7d8ac424b228c52ca98125cf44
+branches:
+  - name: stable/ussuri
+    location: 16.0.0.0rc1