Merge lp:~zulcss/openstack-charm-testing/lxd-kvm-missing-option into lp:openstack-charm-testing

[Chuck Short]

Re-add dropped option

=== modified file 'bundles/lxd/source/default.yaml'
--- bundles/lxd/source/default.yaml	2016-03-29 17:18:18 +0000
+++ bundles/lxd/source/default.yaml	2016-04-05 14:42:13 +0000
@@ -90,6 +90,7 @@
         block-device: /dev/vdb
         ephemeral-unmount: /mnt
         storage-type: lvm
+        overwrite: "true"
   relations:
     - [ keystone, mysql ]
     - [ nova-cloud-controller, mysql ]
 
=== modified file 'bundles/lxd/source/next.yaml'
--- bundles/lxd/source/next.yaml	2016-03-29 15:44:36 +0000
+++ bundles/lxd/source/next.yaml	2016-04-05 14:42:13 +0000
@@ -90,6 +90,7 @@
         block-device: /dev/vdb
         ephemeral-unmount: /mnt
         storage-type: lvm
+        overwrite: "true"
   relations:
     - [ keystone, mysql ]
     - [ nova-cloud-controller, mysql ]