Comment 5 for bug 1039386

Unfortunately, I think there's still a problem. Imaging you want to only schedule trusted nodes that have `ngpu==2'. If you specify both those constraints in the `extra_specs' the TrustedFilter plugin will correctly select all trused nodes but the ComputeCapabilitiesFilter will reject all nodes (whether or not the ngpu's is correct) as it will fail on the `trusted' specification. I think we do need to provide a scope for the entries in the `extra_speccs' table.