WebUI tests: Add test for 'ipaautoprivategroups' field on 'ID Ranges' page
Add test_range_auto_private_groups test case to test_trust WebUI test suite to cover the field.
Ticket: https://pagure.io/freeipa/issue/8837
Signed-off-by: Serhii Tsymbaliuk <stsymbal@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>