Add Jinja examples to DSL documentation

[Bob Haddleton]

The DSL documentation has YAQL examples but none for Jinja.

[Bob Haddleton (bob-haddleton)]

Clarification - there is Jinja documentation at the end of the document in the tasks() section, this bug will add examples in other sections as appropriate.

[Dougal Matthews (d0ugal)]

Moved from In Progress because I can't see any recent activity.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/601501
Committed: https://git.openstack.org/cgit/openstack/mistral/commit/?id=09cd21d56106f417305b10c2f8f64568e916e0bd
Submitter: Zuul
Branch: master

commit 09cd21d56106f417305b10c2f8f64568e916e0bd
Author: Vitalii Solodilov <email address hidden>
Date: Tue Sep 11 10:33:59 2018 +0400

    Docs improvements: task timeout, global context, Docker and jinja

    A not obvious point for users is the task does not retry after a
    timeout is triggered. Added clarification in the retry section.

    The documentation contains enough example with Jinja usage. Improved
    only the create_vm workflow definition.

    Added global publishing to the doc. It is brash copy-paste from
    https://specs.openstack.org/openstack/mistral-specs/specs/pike/approved/advanced_publishing.html without mention of atomic publish.

    Move Docker guides to the installation section.

    Change-Id: I149b2e1dff7f86bd356f4dd2f758659469e6a4a8
    Closes-Bug: #1789384
    Closes-Bug: #1690156
    Closes-Bug: #1779244
    Signed-off-by: Vitalii Solodilov <email address hidden>

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/mistral 9.0.0.0b1 development milestone.