The update of the apt cache and the package installation
can all be handled in a single task by providing the
package action plugin with the right parameters. This
removes an extra task to optimise execution.
The minimum Ansible version is raised to 2.2 due to a
known bug [1] in Ansible's apt module which does not
update the cache properly if the cache update and the
install are combined in a single task.
[1] https://github.com/ansible/ansible-modules-core/issues/1497
Change-Id: If6b3261bba643759f12a811d849ce9cb1040497f
0b11c78551