Release Placement 5.0.1 from stable/wallaby

$ git log stable/wallaby --oneline --no-merges
adf525a8 Make sure the policy upgrade check get a valid config
cb77dc8f Add a reproduction test for bug story/2008831
6bb8ff5b Update TOX_CONSTRAINTS_FILE for stable/wallaby
5afcd804 Update .gitreview for stable/wallaby

We got multiple help requests due to the bug [1], fixed in adf525as so I
feel that we need to get that bugfix released.

[1] https://storyboard.openstack.org/#!/story/2008831

Change-Id: I8a336894daa75fffb2ae40d35d18eae6926491b0

deliverables/wallaby/placement.yaml

@@ -17,6 +17,10 @@ releases:
       - repo: openstack/placement
         hash: f41599e1ada2dfc7900817b09b623422d9d1dbe9
     diff-start: 4.0.0
+  - version: 5.0.1
+    projects:
+      - repo: openstack/placement
+        hash: adf525a8f176fe37222d08478c9fe08db823db98
 branches:
   - name: stable/wallaby
     location: 5.0.0.0rc1