[Fake] Fake plugin fails on images with requiretty

[Andrew Lazarev]

Fake plugins is supposed to be run on stock images with cloud-init. But there is a limitation that prevents using it on CentOS/Fedora images. Sahara expects option to be disabled.

This can be fixed by disabling requiretty in cloud-init.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/138942

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/138942
Committed: https://git.openstack.org/cgit/openstack/sahara/commit/?id=0a0cb1f68aff196c926963fdf15f15902216bebc
Submitter: Jenkins
Branch: master

commit 0a0cb1f68aff196c926963fdf15f15902216bebc
Author: Andrew Lazarev <email address hidden>
Date: Wed Dec 3 19:10:17 2014 -0800

    Disabled requiretty in cloud-init script

    Sahara expects requiretty to be disabled. Usually we disable it in
    diskimagebuilder. Disabling it in runtime to be able to use stock
    images.

    Change-Id: I62bfd6db5ce9cbf6ab3c3a33d0053f0c4166082a
    Closes-Bug: #1399052