While investigating the failures when you move func tests to py3, I
noticed a whole bunch of
ResourceWarning: unclosed <socket.socket ...>
noise. This should fix it.
While we're at it, make get_capabilities less stupid.
Change-Id: I3913e9334090b04a78143e0b70f621aad30fc642
Related-Change: I86d24104033b490a35178fc504d88c1e4a566628