get-pip.py will not get the latest version of get-pip.py and won't overwrite existing get-pip.py

[Andy McCrae]

If get-pip.py fails for some reason but gets a blank file re-runs will never work because the get_url module won't get the file if destination already exists in any form (regardless of whether its different or not).

This is also the case where a newer version of get-pip.py is added, the old version won't be overwritten.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/162183

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/162183
Committed: https://git.openstack.org/cgit/stackforge/os-ansible-deployment/commit/?id=1bfbe3be25b40df403c2bf332ef60a0c6a0f2884
Submitter: Jenkins
Branch: master

commit 1bfbe3be25b40df403c2bf332ef60a0c6a0f2884
Author: Andy McCrae <email address hidden>
Date: Fri Mar 6 15:08:34 2015 +0000

    Ensure get-pip.py is retrieved properly

    Without force: "yes" the get_url module will only retrieve the file if
    the destination doesn't exist. This causes issues if, for example, the
    get-pip.py exists but is empty (due to an issue), or if the get-pip.py
    is updated at some point.

    Change-Id: I9d6933c837e0e38d51dfb57a3eddd1ca461e0723
    Closes-Bug: #1429165