'GET /api/dependency_resolvers/requirements
Find all "simple" requirements that could be resolved "exactly"
by all dependency resolvers that support this operation.
:type   index:    int
:param  index:    index of the dependency resolver
:rtype:     dict
:returns:   a dictified description of the requirement that could
be resolved (keyed on \'requirement\') and the index of
the corresponding resolver (keyed on \'index\').'

@expose_api
@require_admin
def manager_requirements(self, trans, **kwds):

    return self._view.manager_requirements()
