Fix error when data dir doesn't exist and nothing is built
Fix error when data dir doesn't exist and nothing is built

Change-Id: Ic8bb0d6cedf351be764281fbbfee5b848c845296
Bug: https://github.com/openstack-packages/DLRN/issues/10

openstack-packages/DLRN,openstack-packages/delorean,openstack-packages/DLRN,openstack-packages/delorean