devstack swift cannot create data dirs Permission denied

[Geronimo Orozco]

devstack fails when SWIFT_DATA_DIR is set on log sections..

cat local.conf

SWIFT_DATA_DIR=/data

./stack.sh

2014-04-04 23:40:55.883 | + swift_log_dir=/data/logs
2014-04-04 23:40:55.885 | + rm -rf /data/logs
2014-04-04 23:40:55.888 | + mkdir -p /data/logs/hourly
2014-04-04 23:40:55.890 | mkdir: cannot create directory `/data': Permission denied
2014-04-04 23:40:55.892 | + exit_trap
2014-04-04 23:40:55.896 | + local r=1
2014-04-04 23:40:55.898 | ++ jobs -p
2014-04-04 23:40:55.901 | + jobs=
2014-04-04 23:40:55.903 | + [[ -n '' ]]
2014-04-04 23:40:55.905 | + exit 1

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/85528

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/165951

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/165951
Committed: https://git.openstack.org/cgit/openstack-dev/devstack/commit/?id=2f6576bfaf7f43d9bf820e3e5ecc0b7fd136ce3c
Submitter: Jenkins
Branch: master

commit 2f6576bfaf7f43d9bf820e3e5ecc0b7fd136ce3c
Author: Geronimo Orozco <email address hidden>
Date: Thu Mar 19 12:08:23 2015 -0600

    Creates SWIFT_DATA_DIR if it does not exist

    If SWIFT_DATA_DIR is set on local.conf we need to make sure to create
    the directory with proper permissions

    Change-Id: If29fa53f01b4c0c8a881ec3734383ecffac334ce
    Closes-Bug: 1302893