Ansible 2.7 compatibility

[retlehs]

updated the connection role to account for this change in ansible versions:

2.5: [0;32m "\u001b[0;32mroot", [0m
2.7: [0;32m "\u001b[0;33mroot", [0m

props @swalkinshaw

close #1041

[swalkinshaw]

The difference in output is due to a different colour used by success or changed status. We have changed_when: false on the task but maybe that isn't making it return "success" anymore.

So in 2.6 or 2.7, the task now reports as changed which changes the colour output.

We should ideally try and find a less brittle way of determining if root can connect if possible although I know @fullyint did a lot of work on this so maybe there isn't really.