Fix /tmp/swift-rings/backups/ files deletion

Add permission escalation to the swift ring generation playbook

Task: 41256
Story: 2008354
Change-Id: I7fa88a203274c3030b3d8e5208f94b2230d43c68

ansible/roles/swift-rings/tasks/main.yml

@@ -62,6 +62,7 @@
       file:
         path: "{{ swift_ring_build_path }}"
         state: absent
+      become: true
 
   delegate_to: "{{ swift_ring_build_host }}"
   vars:

releasenotes/notes/story-2008354-0c34e2ad7aeb7d3d.yaml

+---
+fixes:
+  - |
+    Fixes issue with deleting swift ring temporary files.
+    See `story 2008354 <https://storyboard.openstack.org/#!/story/2008354>`__ 
+    for details.