Comment 36 for bug 1792343

Reviewed: https://review.openstack.org/636978
Committed: https://git.openstack.org/cgit/openstack/tripleo-common/commit/?id=a2550158e1aff6c0d6f23ec1bb7e19ab4c043b5e
Submitter: Zuul
Branch: stable/queens

commit a2550158e1aff6c0d6f23ec1bb7e19ab4c043b5e
Author: ekultails <email address hidden>
Date: Wed Feb 27 15:32:28 2019 -0500

    Run NetworkDeployment as async task

    This commit adds special handling of the NetworkDeployment such that it
    will be run as an async task with ansible. This should prevent any
    issues where the network configuration causes the ssh connection to drop
    and the ansible task to either be unnecessarily retried or failed.

    Also added are three variables that can be used to control the async
    behavior:

    async_deployment: boolean which will toggle running all deployments in
                      async mode.
    async_timeout: timeout in seconds to wait for async tasks
    async_poll: interval in seconds to check async task status

    These variables can only be set if running the config-download process
    manually, however a future patch could wire them up to Heat parameters.

    Change-Id: If1f35980a98a9015ca65f2c6a3e4db04725f1c10
    Closes-Bug: #1792343
    (cherry picked from commit ac4ac838e1a3eda32bbf8e9c0a61a89142688194)