gate: devstack failing intermittently on unbale to find aes key file

[Anusha]

Gate seems to occasionally break on unable to get the aes_key file

2017-11-20 03:31:00.680 | /opt/stack/new/congress/devstack/plugin.sh:308:start_congress_service_and_check
2017-11-20 03:31:00.680 | /opt/stack/new/congress/devstack/plugin.sh:240:die
2017-11-20 03:31:00.686 | [ERROR] /opt/stack/new/congress/devstack/plugin.sh:240 Unexpected error where Congress responds before key files are created.
2017-11-20 03:31:01.699 | Error on exit
2017-11-20 03:31:02.215 | World dumping... see /opt/stack/new/worlddump-2017-11-20-033102.txt for details

[Anusha (anusha-iiitm)]

Reference: http://logs.openstack.org/88/518288/1/gate/congress-devstack-api-mysql/7d3725d/logs/devstacklog.txt.gz#_2017-11-17_07_47_33_608

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/521406
Committed: https://git.openstack.org/cgit/openstack/congress/commit/?id=d187dd6ca47511cea90db431d45d63749bdd6c72
Submitter: Zuul
Branch: master

commit d187dd6ca47511cea90db431d45d63749bdd6c72
Author: Anusha Ramineni <email address hidden>
Date: Mon Nov 20 08:38:25 2017 +0530

    Fix intermittent gate failure on key file generation

    Closes-Bug: #1733268
    Change-Id: Ia109e5e6711cb2802050b560cc8e20210bfee8b5

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/congress 7.0.0.0b2 development milestone.