'postgresql_packages' is undefined with Ansible 2.2

[geerlingguy]

Ansible 2.1.2+ (including 2.2) seems to be statically including role includes (see ansible/ansible#17687), which means some variable-defining tasks aren't run properly, but then later tasks which are skipped in a role that's ignored are still being run, but with undefined variables, which introduce an error like:

TASK [geerlingguy.firewall : Ensure the firewall is enabled and will start on boot.] ***
fatal: [drupalvm]: FAILED! => {"changed": false, "failed": true, "msg": "Could not find the requested service \"'firewall'\": "}

RUNNING HANDLER [geerlingguy.firewall : restart firewall] **********************

PLAY RECAP *********************************************************************
drupalvm                   : ok=10   changed=6    unreachable=0    failed=1

[geerlingguy]

I have a fix for this, using static: no for some of the role includes. See: ansible/ansible#17687