openstack overcloud delete shows user input prompt after providing input

[Steve Baker]

openstack overcloud delete show user input prompt after prividing input:

(undercloud) [stack@undercloud-0 ~]$ openstack overcloud delete openshift
y
Are you sure you want to delete this overcloud [y/N]? Undeploying stack openshift..

The user input prompt shows after providing the input. If no input is provided it appears to be stuck

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/647652

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/647652
Committed: https://git.openstack.org/cgit/openstack/python-tripleoclient/commit/?id=c138a4960928e5230d04b96614ebd1715828c23a
Submitter: Zuul
Branch: master

commit c138a4960928e5230d04b96614ebd1715828c23a
Author: Steve Baker <email address hidden>
Date: Tue Mar 26 16:54:15 2019 +1300

    Fix confirmation prompt for overcloud delete

    In python-3 the confirmation prompt isn't displayed without a flush on
    stdout. This change fixes that.

    This change also prevents a stacktrace from being printed when a
    CommandError is raised, which is a much friendlier way of displaying
    that user inputed caused a command to fail.

    Change-Id: Ibab5abf6ab57793ca988b36d3411767f82e7e756
    Closes-Bug: #1821672

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/python-tripleoclient 11.4.0 release.