[System Tests] Need to provide ability to run tests with changed default password for master

[Andrey Sledzinskiy]

We need to run system tests with changed default master password
Especially it's important for upgrade tests where such bug has been recently found

[Matthew Mosesohn (raytrac3r)]

Just use nailgun or ostf service password if you're on 6.0. We don't have a good fix for 5.1.x, unfortuantely. in astute.yaml, it's in keystone['nailgun_user'] and keystone['nailgun_password'] (or replace nailgun with ostf)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/137454

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/5.1
Review: https://review.openstack.org/137800

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/6.0
Review: https://review.openstack.org/140629

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/137454
Committed: https://git.openstack.org/cgit/stackforge/fuel-main/commit/?id=183ad8c9de702c0be02f8574321704deee7b3453
Submitter: Jenkins
Branch: master

commit 183ad8c9de702c0be02f8574321704deee7b3453
Author: Dennis Dmitriev <email address hidden>
Date: Wed Nov 26 21:15:21 2014 +0200

    Customize root password and keystone password on admin node.

    - passwords can be customized via environment variables;
    - root password changes right after provisioning admin node;
    - keystone password changes after deploying admin node.

    Change-Id: I22dc8659c94138de9e49833316e31f1e3fae295c
    Closes-Bug: #1381962

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/140629
Committed: https://git.openstack.org/cgit/stackforge/fuel-main/commit/?id=79bab82301a6cb1df4305f9e37283a002dd8ba2b
Submitter: Jenkins
Branch: stable/6.0

commit 79bab82301a6cb1df4305f9e37283a002dd8ba2b
Author: Dennis Dmitriev <email address hidden>
Date: Wed Nov 26 21:15:21 2014 +0200

    Customize root password and keystone password on admin node.

    - passwords can be customized via environment variables;
    - root password changes right after provisioning admin node;
    - keystone password changes after deploying admin node.

    Change-Id: I22dc8659c94138de9e49833316e31f1e3fae295c
    Closes-Bug: #1381962

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/137800
Committed: https://git.openstack.org/cgit/stackforge/fuel-main/commit/?id=51c068d67892bc0e048690e2a42186886bbddb7d
Submitter: Jenkins
Branch: stable/5.1

commit 51c068d67892bc0e048690e2a42186886bbddb7d
Author: Dennis Dmitriev <email address hidden>
Date: Fri Dec 5 15:45:53 2014 +0200

    Customize root password and keystone password on admin node.

    - passwords can be customized via environment variables;
    - root password changes right after provisioning admin node;
    - keystone password changes after deploying admin node.

    Change-Id: I1d9232e0531f9e8f5c33baa21afb90d7a437a183
    Closes-Bug: #1381962