Export more information in RAPI group queries

Sadly we don't have a way to test that, for example, all
(G|N|I)Q_CONFIG fields are exported in RAPI, so for now we don't test
this; but we should, in the future.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>