Add a function computing the filter arguments
Add a function computing the filter arguments

When collecting live data for queries, we need to also
collect the fields the filter talks about, not only the
fields the user wants to see. Therefore, we need a function
computing those fields.

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

ganeti/ganeti,mbakke/ganeti,bitemyapp/ganeti,yiannist/ganeti,onponomarev/ganeti,leshchevds/ganeti,andir/ganeti,mbakke/ganeti,ganeti/ganeti,andir/ganeti,ganeti/ganeti,leshchevds/ganeti,leshchevds/ganeti,mbakke/ganeti,bitemyapp/ganeti,onponomarev/ganeti,yiannist/ganeti,yiannist/ganeti,andir/ganeti