Release mox3 1.0.0

This version officially drop the python 2 support so we release a major
version of mox3 to inform user that we break
the backward compatibility.

OpenStack is dropping the py2.7 support in ussuri cycle.

Complete discussion & schedule can be found in
-
http://lists.openstack.org/pipermail/openstack-discuss/2019-October/010142.html
- https://etherpad.openstack.org/p/drop-python2-support

Ussuri Communtiy-wide goal:
https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html

Change-Id: I097c1f710dc6fbf5b019f36240eae6983589ff3c

deliverables/ussuri/mox3.yaml

@@ -6,3 +6,8 @@ team: oslo
 type: library
 repository-settings:
   openstack/mox3: {}
+releases:
+  - version: 1.0.0
+    projects:
+      - repo: openstack/mox3
+        hash: fa22a336bfb79320ee9bef31099f9d4de733c89b