Added missing reverse zones tests setup

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.

tests/dnsrecord/env_cleanup.yml

@@ -129,7 +129,7 @@
        - "{{ zone_prefix_reverse_24 }}"
        - "{{ zone_prefix_reverse_16 }}"
        - "{{ zone_prefix_reverse_8 }}"
+       - "{{ zone_ipv6_reverse }}"
+       - "{{ zone_ipv6_reverse_workaround }}"
        - "{{ testzone }}"
-       - ip6.arpa.
-       - d.f.ip6.arpa.
        - "{{ safezone }}"