Don't shadow Job 'name' property.
Don't shadow Job 'attributes' property.
Don't shadow Printer 'name' property.
Don't shadow Printer 'description' property.
Don't shadow Printer 'location' property.
Don't shadow Printer 'ieee1284-id' property.
Don't shadow Printer 'defaults' property.

Also: fix return of unsupported attributes.
Don't shadow Printer 'supported' property.
Don't shadow Printer 'state-reasons' property.