Comment 4 for bug 1873453

Reviewed: https://review.opendev.org/721332
Committed: https://git.openstack.org/cgit/openstack/tripleo-ansible/commit/?id=4e903e2fcf524e3baee73974cae333275cb2c4e9
Submitter: Zuul
Branch: stable/train

commit 4e903e2fcf524e3baee73974cae333275cb2c4e9
Author: Emilien Macchi <email address hidden>
Date: Fri Apr 17 09:06:36 2020 -0400

    tripleo_container_manage/systemd: add retries mechanism

    It's possible that in CI environment or in slow servers the systemd
    reload takes time to read new systemd services and reload systemd while
    Ansible already moved on and tries to enable these services.

    Adding a retry mechanism so we retry 5 times with a delay of 5 seconds
    between, until systemd service returns success as a result.

    Change-Id: I2bb39d2aae68a0eadaad92cf0fc4e3506fbfc9ca
    Closes-Bug: #1873453
    (cherry picked from commit 6e71ea60b659485e08d02cff7a9966c14c36a88b)