Ansible 2.0 has deprecated the 'ssh' from ansible_ssh_user to become ansible_user.
Change-Id: I15813f638accaa6a31f75dad0b854814264ac493
Closes-Bug: #1635145
In some part in the code we import objects. In the Openstack style
guidelines they recommend to import only modules.
http://docs.openstack.org/developer/hacking/#imports
Change-Id: I4b55cae8c2672f82025a95112b14d441d66f9d6d