Without this change the "Import variables specific to distribution"
tasks fail with "Could not find file on the Ansible Controller..."
on environments with inject facts disabled.
This changes the tests to run with ansible with
inject_facts_as_vars = false and fixes other roles and playbooks.
In some case the tests needs to have the class A, B and C of reverse DNS
set in order to function properly. Those missing classes where
added/updated in dnsrecord, services and host tests.
Due to setting aaaa_extra_create_reverse or a_extra_create_reverse when not
needed, host module fails to add a host with reverse address. This patch
fixes the behavior by only adding *_extra_create_reverse when needed.
