htools Luxi backend: query forthcoming flag
htools Luxi backend: query forthcoming flag

As forthcoming instances need to be handled differently
by htools than real ones, also query that bit via the
Luxi interface.

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

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