"steps" job field not shown in checkbox-cli

[Pierre Equoy]

Plainbox version: 0.21c4

According to the documentation [1], since plainbox 0.17 new fields have appeared to replace the `description` field when describing tests: `purpose`, `steps` and `verification`.

However, it looks like `steps` are not shown (at least in checkbox-cli) when running a test plan.

Example:

In my jobs unit, I have the following test:

id: dock/docking
plugin: manual
estimated_duration: 30.00
_summary: Docking test
_purpose:
    This test will check the device can be used after docking.
_steps:
    1. Dock the device to the docking unit.
_verification:
    Is the device working as expected after being docked?

When running plainbox (through checkbox-cli in a terminal), the steps do not appear:

--------------------------------[ Docking test ]--------------------------------
ID: 2013.com.canonical.certification::dock/docking
Category: 2013.com.canonical.plainbox::uncategorised
This test will check the device can be used after docking.
Is the device working as expected after being docked?
Please decide what to do next:
  outcome: job needs verification
  comments: none
Pick an action
  c => add a comment
  p => set outcome to pass
  f => set outcome to fail
  s => set outcome to skip
[cpfs]:

[1]: http://plainbox.readthedocs.org/en/latest/manpages/plainbox-job-units.html