os-ansible-aio-check.sh creates file called 'null'

[Jesse Pretorius]

if grep "^PermitRootLogin" /etc/ssh/sshd_config > null; then

should actually be

if grep "^PermitRootLogin" /etc/ssh/sshd_config > /dev/null; then

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/141068

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/141068
Committed: https://git.openstack.org/cgit/stackforge/os-ansible-deployment/commit/?id=6c7e170d98031e3da15a4b57c761cd702bdda23d
Submitter: Jenkins
Branch: master

commit 6c7e170d98031e3da15a4b57c761cd702bdda23d
Author: Jesse Pretorius <email address hidden>
Date: Thu Dec 11 15:20:11 2014 +0000

    Correctly pipe the sshd check to /dev/null

    This patch corrects the pipe of the sshd configuration check to
    /dev/null. The script therefore no longer leaves a file called 'null'
    behind on the deployment host.

    Change-Id: Ib707d7462e5e444dddceff105b219263d0283e0c
    Closes-Bug: #1401567