Comment 7 for bug 1691749

Reviewed: https://review.openstack.org/467659
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible/commit/?id=6d87aa8debea027f20bcd64d57edaee20b91998a
Submitter: Jenkins
Branch: stable/ocata

commit 6d87aa8debea027f20bcd64d57edaee20b91998a
Author: Stuart Grace <email address hidden>
Date: Thu May 18 13:35:06 2017 +0100

    Add var for environment used only inside playbooks

    When global_environment_variables is set in user_variables.yml, this
    installs environment settings in /etc/environment on all hosts and
    containers. These remain in place after deployment is complete.

    This patch adds a similar variable deployment_environment_variables
    that defines environment strings applied only while the playbooks
    are running. They leave nothing behind on the hosts or containers.

    This may be used, for example, for proxy settings required only
    during deployment. A simpler no_proxy setting is adequate during
    deployment, so this provides a workaround to Bug #1691749.

    (cherry picked from commit 77ac88197c223968e845e57706b81af24d6aa443)

    Change-Id: Ia15d2133c6749fa9496bbf9359b8bf075742d60e
    Related-Bug: #1691749