delegate_to is broken because we set ansible_ssh_user in group_vars

[Sam Yaple]

When using delegate_to the variable will not be properly overridden because we are setting the ansible_ssh_user in the group_vars instead of the inventory or ansible.cfg config.

This is an option that is for operators and not meant to be part of Kolla at all.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/224005

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/224005
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=8cdaf01c0a7a215c80a64cdcbe8b523b5c7d59dd
Submitter: Jenkins
Branch: master

commit 8cdaf01c0a7a215c80a64cdcbe8b523b5c7d59dd
Author: Sam Yaple <email address hidden>
Date: Wed Sep 16 10:02:40 2015 +0000

    Remove ansible_ssh_user from Kolla configs

    The option is not for Kolla to be managing, this is all on the
    operator to handle the ssh communication to the other hosts.

    Additionally, setting it like this will break delegate_to

    Change-Id: Ib9caa7014049f87f3ece525a32f7587e33840ea9
    Closes-Bug: #1496331