Release final mistral-extra for ussuri

Final ussuri non-client lib release for the April 2 deadline.

Please leave +1 if we are all set and can proceed. Leave -1 if we
need to wait a little bit longer for something final to land,
then update it with a better commit hash to use for the release
when ready.

Patches with no response will be approved a few days after the
deadline.

Change-Id: Ie486e6a25460b04a54f6f69e3afe74876bc31501
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

deliverables/ussuri/mistral-extra.yaml

@@ -11,3 +11,10 @@ releases:
     projects:
       - repo: openstack/mistral-extra
         hash: 5a641a9166d4cb8caf1811c2fe64bc18ae5ddf27
+  - version: 10.0.1
+    projects:
+      - repo: openstack/mistral-extra
+        hash: b615bd4b48a97e8f90dc64cd89e890cc2e688a43
+branches:
+  - name: stable/ussuri
+    location: 10.0.1