Fix inconsistency in python and haskell objects
Fix inconsistency in python and haskell objects

Make hv and disk states default fields with notSerializeDefaultField
flag set in haskell objects in order to make them consistent with
the corresponding fields in python objects.

Signed-off-by: Oleg Ponomarev <c100474c6090841e9d55cde74d38d81efd269b8d@google.com>
Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

andir/ganeti,mbakke/ganeti,andir/ganeti,ganeti/ganeti,mbakke/ganeti,onponomarev/ganeti,onponomarev/ganeti,ganeti/ganeti,leshchevds/ganeti,mbakke/ganeti,leshchevds/ganeti,ganeti/ganeti,andir/ganeti,leshchevds/ganeti