machine.action clone does not accept filter

[Peter Makowski]

Attempting to pass the filter parameter to machine.action clone results in an error being thrown.

request:
{"method":"machine.action","type":0,"params":{"action":"clone", "system_id":"tw8pfr", "extra":{"interfaces":true,"storage":false},
"filter":{"id":"t7ht7q"}},"request_id":26}

response:
{"type": 1, "request_id": 30, "rtype": 1, "error": "Clone._execute() got an unexpected keyword argument 'system_id'"}

Why is this an issue:
We need to be able to use a filter as a destination for server-side machine listing (e.g. groups of machines where we don't have a complete list of all system_ids for each group).