Release watcher-dashboard for Ussuri

RC1 release for watcher-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: Idd5d4a98d64167102e9a4eeda49961365121f2c4
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

deliverables/ussuri/watcher-dashboard.yaml

@@ -6,3 +6,11 @@ team: watcher
 type: horizon-plugin
 repository-settings:
   openstack/watcher-dashboard: {}
+releases:
+  - version: 3.0.0.0rc1
+    projects:
+      - repo: openstack/watcher-dashboard
+        hash: 30bb75d744ce976dbc9922a8d6f6870ccff288b2
+branches:
+  - name: stable/ussuri
+    location: 3.0.0.0rc1