Release magnum for Ussuri

RC1 release for magnum. 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: I49443725096647e6507c376c6818d3d32158f174
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

deliverables/ussuri/magnum.yaml

@@ -5,3 +5,11 @@ team: magnum
 type: service
 repository-settings:
   openstack/magnum: {}
+releases:
+  - version: 10.0.0.0rc1
+    projects:
+      - repo: openstack/magnum
+        hash: 7c4fb32189198ee69a0c50d7c498fc349c590962
+branches:
+  - name: stable/ussuri
+    location: 10.0.0.0rc1