pylint: Teach pylint about more RRs types
There are many types of RRs which are provided by dnspython.
This is not all, but enough for now to fix linting errors
caused by new dnspython 2.0.
Fixes: https://pagure.io/freeipa/issue/8468
Signed-off-by: Stanislav Levin <slev@altlinux.org>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>