Release mistral-dashboard for Ussuri

RC1 release for mistral-dashboard. 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: Ieb8082c678964e18a820f73e9ef638c7bbaafecf
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

deliverables/ussuri/mistral-dashboard.yaml

@@ -11,3 +11,10 @@ releases:
     projects:
       - repo: openstack/mistral-dashboard
         hash: dcd4303c4b7ddd249f1b15db735f28482d3e944c
+  - version: 10.0.0.0rc1
+    projects:
+      - repo: openstack/mistral-dashboard
+        hash: 9c19e28c218f50682a735772f4ad3ee616f65368
+branches:
+  - name: stable/ussuri
+    location: 10.0.0.0rc1