v3006.20
Fix zcbuildout and pip tests: use onedir virtualenv and local wheels
Fix minion process name pollution and improve process title visibility
Check if there are multiple version installed after upgrade
fix lint
Fix beacons not sent when beacon_refresh called
Fix broken backport 64229 form master to 3006.x
Pyupgrade and drop six
Enable lazy_loader_strict_matching in all test suites