Comment 9 for bug 1892528

Reviewed: https://review.opendev.org/c/openstack/tacker/+/803083
Committed: https://opendev.org/openstack/tacker/commit/de9fdf5fc6c7c04a77442f6bc7e39331f55578f0
Submitter: "Zuul (22348)"
Branch: stable/ussuri

commit de9fdf5fc6c7c04a77442f6bc7e39331f55578f0
Author: Quang Hiep <email address hidden>
Date: Thu Apr 23 06:07:21 2020 +0000

    Fix create custom Mistral action

    Class mistral.actions.base.Action is moved to
    mistral_lib.actions.Action accoring to
    https://docs.openstack.org/mistral/latest/developer/extensions/creating_custom_action.html

    This change imports the new action class and
    add context parameter for the run method.

    Closes-Bug: #1892528
    Change-Id: I7858f69ca051c64a8ac52e6bfde353d55a42a43e
    (cherry picked from commit b38ed56020ee403e11ef60e3ebd35ae0fca9b868)