Check of $USE_GET_PIP in tools/install_pip.sh is invalid

[Kiyohiro Adachi]

Compare the following statement will always be true.

if [[ -n "$USE_GET_PIP" ]]; then
    install_get_pip
else
    install_pip_tarball
fi

So because $USE_GET_PIP is '0' or '1'.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/61328

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/61328
Committed: https://git.openstack.org/cgit/openstack-dev/devstack/commit/?id=a515a70e2b58912877bdf2952e7812410da647f3
Submitter: Jenkins
Branch: master

commit a515a70e2b58912877bdf2952e7812410da647f3
Author: KIYOHIRO ADACHI <email address hidden>
Date: Wed Dec 11 16:11:28 2013 +0900

    Fixed check method of $USE_GET_PIP

    '[[ -n "$USE_GET_PIP" ]]' always TRUE
    because $USE_GET_PIP is '0' or '1'.

    Change-Id: I73c4c6befe2126882ef21991b2a3fe712b2ac388
    Closes-Bug: #1259824