invalid use of concent_variant

[etam]

https://github.com/golemfactory/golem/blob/bdce5dee5183f241c137ac0e45f21525d4166b1e/golem/network/concent/received_handler.py#L181

Client doesn't have concent_variant member. It's in Node and it's passed to ConcentClientService.

Proper access would be ...client.concent_service.variant['pubkey']

[etam]

There is a unit test, that mocks Client and adds concent_variant to it.
Maybe using Mock(spec=Client) would help.