Remove server pip conf upgrade playbook is broken

[Ian Cordasco]

There are presently two bugs in the liberty upgrade utilities for the removal of pip.conf: https://git.openstack.org/cgit/openstack/openstack-ansible/tree/scripts/upgrade-utilities/playbooks/repo-server-pip-conf-removal.yml?h=liberty

The first is that `gather_facts` should be `true` otherwise `ansible_env` will be undefined which will prevent its usage below.

The second is that `path` is required instead of `src` for the file module.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: liberty
Review: https://review.openstack.org/302419

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/302419
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible/commit/?id=b7c410df5f6c12fb649b795016ebfb0d820688cd
Submitter: Jenkins
Branch: liberty

commit b7c410df5f6c12fb649b795016ebfb0d820688cd
Author: Ian Cordasco <email address hidden>
Date: Wed Apr 6 14:49:57 2016 -0500

    Fix repository server upgrades

    When upgrading the repository server, the pip.conf needs to be absent
    for the upgrade to succeed. In order for the playbook to succeed which
    performs this action, we need to gather facts for ``ansible_env`` to be
    defined and to appropriately use ansible's file module.

    Closes-Bug: #1566915
    Change-Id: I0e6078adbc3260ea7df816a485b93e606cd5f131

[Davanum Srinivas (DIMS) (dims-v)]

This issue was fixed in the openstack/openstack-ansible 12.0.11 release.