Fix ansible apt parameters.

[thom8]

Fixed up the apt params based on the Ansible docs - http://docs.ansible.com/apt_module.html

[geerlingguy]

Looks good! Test failures are unrelated, due to Ansible version currently being used by Travis when running tests.

[geerlingguy]

Also, of note, it seems the convention of using present over installed for packaging modules has been a slow change over the past year or so, but I couldn't find the specific time when the change was made official in the docs. Up until recently, I remembered seeing installed as one of the documented options.

It should still work, though, right?

[thom8]

I've found references to both "installed" & "present" so I'd assume both will work.
"installed" is probably still supported for backwards compatibility but "present" is the currently documented state -- http://docs.ansible.com/apt_module.html#options