support for putting vm images in custom locations

Change-Id: I685de4207f1f7f17264cc4ad2d81c3348ca20074
diff --git a/.kitchen.yml b/.kitchen.yml
index 8518d18..379123c 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -149,6 +149,7 @@
         control_cloud_digitalocean.sls: tests/pillar/control_cloud_digitalocean.sls
         control_cloud_openstack.sls: tests/pillar/control_cloud_openstack.sls
         control_virt.sls: tests/pillar/control_virt.sls
+        control_virt_custom.sls: tests/pillar/control_virt_custom.sls
 
   - name: minion_multi_master_failover
     provisioner: