List the nodes, ask all 'vagrant' minions, return dict of grains (enhanced).

    CLI Example:

    .. code-block:: bash

        salt-call -F

def list_nodes_full(call=None):
    '''
    List the nodes, ask all 'vagrant' minions, return dict of grains (enhanced).

    CLI Example:

    .. code-block:: bash

        salt-call -F
    '''
    ret = _list_nodes(call)

    for key, grains in ret.items():  # clean up some hyperverbose grains -- everything is too much
        try:
            del grains['cpu_flags'], grains['disks'], grains['pythonpath'], grains['dns'], grains['gpus']
        except KeyError:
            pass  # ignore absence of things we are eliminating
        except TypeError:
            del ret[key]  # eliminate all reference to unexpected (None) values.

    reqs = _build_required_items(ret)
    for name in ret:
        ret[name].update(reqs[name])
    return ret