FYI do NOT approve stable/grizzly and stable/havana changes right now: Sean Dague wrote:

Because of a pip issue with netaddr on stable/grizzly devstack, all the stable/havana changes for jobs that include grenade are currently blocked. This is because of stevedore's version enforcement of netaddr versions inside the cinder scheduler.

John, Chmouel, Dean, and I have got eyes on it, waiting for a check to return to figure out if we've gotten it sorted this time. Hopefully it will be resolved soon, but until then havana jobs are just killing the gate.

-- Thierry Carrez (ttx)