tests: adapt test_ldap_id_cleanup to files provider
Let's take advantage of the files provider and start to get rid of the
local provider references in our code.
The only changes requred were the obvious change from "local" to "files"
and from "LOCAL" to "FILES".
Related:
https://pagure.io/SSSD/sssd/issue/3304
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
Reviewed-by: Pavel Březina <pbrezina@redhat.com>