Adds apt cache update before installing dependencies

[tseho]

The task Add dependencies for PHP versions (Debian). is failing when the role ansible-role-php-versions is the first one to be run in a playbook since apt cache has never been run.

[geerlingguy]

@tseho - As in the test playbook, I'd rather have apt cache operations performed as part of the playbook / upstream from Ansible roles (otherwise every Ansible role I use would be adding a task for Debian-based OSes for updating the apt cache).