`use_fully_qualified_names` is not a valid parameter for `[sssd]` section
of sssd.conf, it can be specified only in domain section.
According to `man sssd.conf` it simply requires all requests to be fully
qualified, otherwise no result will be found. It is irrelevant to the
test scenario, so removing it.
Related to: https://pagure.io/freeipa/issue/8219
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Sergey Orlov
e01e7fe6c6