Comment 0 for bug 1576261

Scenario:
1. Create cluster with 1 controller
2. Deploy cluster
3. Try to download deployment graph with command: fuel2 graph download

Actual result:
If command "fuel2 graph download --env 2 --all --file cluster_graph.yaml" has not option 'default' then deployment graph output file will be empty
http://paste.openstack.org/show/495680/
Expected result:
Output file not empty, contains deployment graph

iso: 250