python-tripleoclient should allow to upload individual images

[Yolanda Robla]

When trying to replace an image , we need to use the upload command from python-tripleoclient. But currently, it's asking to have all the images present, even if we just need to replace one. I'd like to have a flag that when passed, it just skips all the checks for existing images, and allows to upload only the image we need.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/577799

[OpenStack Infra (hudson-openstack)]

Change abandoned by Emilien Macchi (<email address hidden>) on branch: master
Review: https://review.openstack.org/577799
Reason: tripleo gate is now broken, I'm clearing the gate. Please do not recheck or restore this patch, I'll take care of it when things work again.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/577799
Committed: https://git.openstack.org/cgit/openstack/python-tripleoclient/commit/?id=84a270a4181527a1dbe445a0d5ccd16381d0a00e
Submitter: Zuul
Branch: master

commit 84a270a4181527a1dbe445a0d5ccd16381d0a00e
Author: Yolanda Robla <email address hidden>
Date: Mon Jun 25 14:06:35 2018 +0200

    Allow to specify the image type to upload

    When trying to just replace a single image in the overcloud,
    the client is asking for all the images to be present in
    the working directory. Allowing to pass an image-type flag
    (with os/ipa values), that will restrict the upload to that type.

    Change-Id: I4e48458f83d2a646aad873b0577dc3bea766d2d7
    Fixes-Bug: #1778500