Comment 14 for bug 1694509

@jungleboyj confirms that the revert/blacklist for 1.57.4 worked

http://logstash.openstack.org/#/dashboard/file/logstash.json?query=message:%5C%22%2Fusr%2Flocal%2Flib%2Fpython2.7%2Fdist-packages%2Ftooz%2Fdrivers%2Fetcd3gw.py:113%20in%20acquire%5C%22%20AND%20tags:%5C%22screen-c-vol.txt%5C%22&from=7d

So one of the changes that went into 1.57.4 is causing issues

http://logs.openstack.org/63/482063/5/check/gate-releases-tox-list-changes-ubuntu-xenial/aa9b94f/console.html.gz#_2017-07-10_19_30_08_083924

Which means it's probably from:
https://review.openstack.org/#/c/478202/2/tooz/drivers/etcd3gw.py

Thanks,
Dims