This plugin only cleans workspaces from slaves which match the jobs label expression, but imho it should ignore the label.

Scenario: I have some big and some small slaves, and a job which became too big on the small slaves. So I changed it's label expression to only run on the big slaves.

Now the cleanup of workspaces only happens on the big slaves, and the one from the small slave is left lying around.

Expected: Should always clean all workspaces from all slaves.