'Return effective role assignments query URL from given filters.
For test methods in this class, effetive will always be true. As in
effective mode, inherited_to_projects, group_id, domain_id and
project_id will always be desconsidered from provided filters.
:param filters: query parameters are created with the provided filters.
Valid filters are: role_id, domain_id, project_id,
group_id, user_id and inherited_to_projects.
:returns: role assignments query URL.'

def _get_role_assignments_query_url(self, **filters):

    query_filters = filters.copy()
    query_filters.pop('inherited_to_projects')
    query_filters.pop('group_id', None)
    query_filters.pop('domain_id', None)
    query_filters.pop('project_id', None)
    return self.build_role_assignment_query_url(effective=True, **query_filters)
