Missing attribute in chef 11

[Benjile]

When use against chef 11 this error raises:
./chef_inventory.py --list Traceback (most recent call last): File "./chef_inventory.py", line 211, in <module> main() File "./chef_inventory.py", line 207, in main ci.execute() File "./chef_inventory.py", line 198, in execute self.list_nodes() File "./chef_inventory.py", line 155, in list_nodes if node["automatic"]["roles"] is not None: KeyError: 'roles'

Environment:
ansible 2.0.0.2
chef-server 11.1.5-1
PyChef 0.3.0

[Benjile]

Pull request:
#9