Before this patch, Haskell types, such as, 'GanetiDaemon' and
'GanetiGroup', and related functions were taking their values from
Haskell constants.  However, given that the role of Haskell to Python
constants is to leverage Haskell and its typesystem, it makes sense to
first define the Haskell types and then have the constants depend on
these types.  In other words, this patch series inverts the dependency
between (some) Haskell types and constants.

Signed-off-by: Jose A. Lopes <jabolopes@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>