Add cinder volume attachment cleanup script

tools/cleanup-cinder-attachments.sh

@@ -0,0 +1,11 @@
+#!/bin/bash -u
+for vol in $(openstack volume list| grep juju| grep in-use| awk '{print $2}'); do
+    echo "Finding attachments for in-use volume $vol"
+    for server in $(openstack volume attachment list  --os-volume-api-version 3.27 --volume-id $vol -c 'Server ID' -f value); do
+        openstack server show $server && continue
+        echo "Deleting attachments for volume $vol from (non-existent) server $server"
+        for id in $(openstack volume attachment list  --os-volume-api-version 3.27 --volume-id $vol -c 'ID' -f value); do
+            openstack volume attachment delete --os-volume-api-version 3.27 $id
+        done
+    done
+done