vm stack in migration state when ssh is not configure correctly

[Moshe Levi]

when doing vm migration with libvirt driver and ssh not configure properly the vm is stack in migrate/resize state forever.
This is happen if the ssh prompt for password, to solve it we need to make sure ssh command won't prompt.

This can be done by adding BatchMode=yes (default no)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/168680

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/168680
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=0a6d0216dc32f802823743d710780e8d5397a680
Submitter: Jenkins
Branch: master

commit 0a6d0216dc32f802823743d710780e8d5397a680
Author: Moshe Levi <email address hidden>
Date: Sat Mar 28 20:14:11 2015 +0300

    libvirt: Add option to ssh to prevent prompting

    When doing migration with libvirt driver there are
    ssh commands that can cause prompting if ssh
    is not configured correctly.
    This patch disables the prompting by adding
    BatchMode=yes option to the ssh command.

    Closes-Bug: #1437790

    Change-Id: Ib1e38f397afaac96a2e1a8717c87a4b6756419db