Bug#1109211: unblock: python-eventlet/0.40.1-1

[Graham Inggs]

Control: retitle -1 python-eventlet/0.40.1-1

There are autopkgtest regressions in glance/2:30.0.0-1 and
mistral/20.0.0-1, but both of these packages have new versions which
have just migrated.