BZ for backporting https://github.com/ManageIQ/manageiq-providers-ansible_tower/pull/9
Also for https://github.com/ManageIQ/manageiq-providers-ansible_tower/pull/13 https://github.com/ManageIQ/manageiq-providers-ansible_tower/pull/16 https://github.com/ManageIQ/manageiq/pull/15626
Verified in 5.9.0.2.20171010190026_0413a06. New types of credentials are presented.