kolla: Fix search and replace strings again

Change-Id: Id5492f57689e905cf2a993c5d9dbcca77ae1deeb
diff --git a/playbooks/kolla-setup-openstack-iscsi-multipath-storpool/pre.yaml b/playbooks/kolla-setup-openstack-iscsi-multipath-storpool/pre.yaml
index 9bfc89b..3b6afa4 100644
--- a/playbooks/kolla-setup-openstack-iscsi-multipath-storpool/pre.yaml
+++ b/playbooks/kolla-setup-openstack-iscsi-multipath-storpool/pre.yaml
@@ -304,4 +304,4 @@
       replace:
         path: "{{ ansible_env.HOME }}/cloud-01/etc/tempest.conf"
         regexp: 'backend_names = storpool,storpool,lvm'
-        replace: backend_names = storpool,lvm
+        replace: backend_names = storpool,lvm-1