Add configuration option 'image_conversion_dir' for cinder.

Cinder configuration option 'image_conversion_dir' set path to directory
used for temporary storage during image conversion.

Change-Id: Icc01549730e6b9457a88cd933b877e9968384775
Related-Prod: PROD-29437 (PROD:29437)
diff --git a/cinder/control/cluster.yml b/cinder/control/cluster.yml
index 286f2ad..a81d257 100644
--- a/cinder/control/cluster.yml
+++ b/cinder/control/cluster.yml
@@ -27,6 +27,8 @@
       backend: {}
       version: ${_param:cinder_version}
       role: ${_param:openstack_node_role}
+      # set 'image_conversion_dir' option in case of ceph deployment volume and controller running on the same node
+      image_conversion_dir: ${_param:cinder_image_conversion_dir_path}
       osapi:
         host: ${_param:cluster_local_address}
       database: