Introduce key for shortes product version in shotgun report

[Nastya Urlapova]

Actually we with introducing packages flow for Fuel we start get product version in such way:
http://paste.openstack.org/show/488748/
It is very complicated, specially for bug reporting.
It would nice if we introduce a key for command shotgun2 report, which allows get report with package versions only.
Vladimir Kozhuhalov is ready for review.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/287820

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/287820
Committed: https://git.openstack.org/cgit/openstack/shotgun/commit/?id=126cfecf2b25abdd7e146f07f28ab95fd7a28b59
Submitter: Jenkins
Branch: master

commit 126cfecf2b25abdd7e146f07f28ab95fd7a28b59
Author: Volodymyr Shypyguzov <email address hidden>
Date: Thu Mar 3 16:03:29 2016 +0200

    Add short-report command, fix logging

    1. Fix logging for cli part to get use of builtin cliff commands -v, -q
    2. Add short-report command for shorter and cleaner output
    3. Fix built-in name shadowing

    Example usage:
        shotgun2 short-report - shows short report version

    Change-Id: I465eca3c509196d6bdc850d0b73fed1e5fb3a3d7
    Closes-Bug: #1551762