ansible_freeipa_module: Fix comparison of bool parameters in compare_args_ipa

Bool types are not iterable. Therefore the comparison using sets was failing
with a TypeError. This prevented to change the bool parameters for hosts.

A test for the host module has been added to verify that the bool parameters
can be modified.

New test:

  tests/host/test_host_bool_params.yml

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1784514