ceph: set rbd_secret_uuid in cinder.conf, not rbd_uuid

The ceph cinder backend script was setting the wrong
config option in cinder.conf for the secret uuid. This
was being masked by a bug in nova which is failing on
this bug when trying to fix the nova bug...right. It
makes sense.

See:

http://docs.ceph.com/docs/master/rbd/rbd-openstack/#configuring-cinder

Change-Id: I4655cae3212d589177d2570403b563a83aad529a
Closes-Bug: #1635488
diff --git a/lib/cinder_backends/ceph b/lib/cinder_backends/ceph
index 9bff5be..a213d5e 100644
--- a/lib/cinder_backends/ceph
+++ b/lib/cinder_backends/ceph
@@ -48,7 +48,7 @@
     iniset $CINDER_CONF $be_name rbd_ceph_conf "$CEPH_CONF"
     iniset $CINDER_CONF $be_name rbd_pool "$CINDER_CEPH_POOL"
     iniset $CINDER_CONF $be_name rbd_user "$CINDER_CEPH_USER"
-    iniset $CINDER_CONF $be_name rbd_uuid "$CINDER_CEPH_UUID"
+    iniset $CINDER_CONF $be_name rbd_secret_uuid "$CINDER_CEPH_UUID"
     iniset $CINDER_CONF $be_name rbd_flatten_volume_from_snapshot False
     iniset $CINDER_CONF $be_name rbd_max_clone_depth 5
     iniset $CINDER_CONF DEFAULT glance_api_version 2