Add field list for the property of being forthcoming
Add field list for the property of being forthcoming

With the introduction of forthcoming objects we also want
to support queries for the property of being forthcoming.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>

mbakke/ganeti,dimara/ganeti,yiannist/ganeti,leshchevds/ganeti,grnet/snf-ganeti,dimara/ganeti,andir/ganeti,ganeti/ganeti,yiannist/ganeti,bitemyapp/ganeti,onponomarev/ganeti,apyrgio/ganeti,ganeti/ganeti,leshchevds/ganeti,leshchevds/ganeti,ganeti/ganeti,onponomarev/ganeti,grnet/snf-ganeti,mbakke/ganeti,andir/ganeti,mbakke/ganeti,apyrgio/ganeti,yiannist/ganeti,andir/ganeti,bitemyapp/ganeti