upgrade pip before using -c option

[Mark Hamzy]

The installed pip can be an older version which does not support the -c argument. Therefore, upgrade pip before using -c.

2018-01-19 22:00:24.230 | dib-run-parts Running /tmp/in_target.d/install.d/60-ironic-agent-install
2018-01-19 22:00:24.232 | + set -eu
2018-01-19 22:00:24.232 | + set -o pipefail
2018-01-19 22:00:24.233 | ++ dirname /tmp/in_target.d/install.d/60-ironic-agent-install
2018-01-19 22:00:24.234 | + SCRIPTDIR=/tmp/in_target.d/install.d
2018-01-19 22:00:24.234 | + IPADIR=/usr/share/ironic-python-agent
2018-01-19 22:00:24.234 | + /usr/share/ironic-python-agent/imagebuild/common/generate_upper_constraints.sh /usr/share/ironic-python-agent/upper-constraints.txt
2018-01-19 22:00:24.240 | generate_upper_constraints.sh: Generating local constraints file...
2018-01-19 22:00:24.240 | generate_upper_constraints.sh: UPPER_CONSTRAINTS_FILE is not defined. Using fallback strategies.
2018-01-19 22:00:24.240 | generate_upper_constraints.sh: File '/opt/stack/new/requirements/upper-constraints.txt' not found. Skipping local file strategy.
2018-01-19 22:00:24.240 | generate_upper_constraints.sh: tox.ini indicates 'https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt' as fallback.
2018-01-19 22:00:24.240 | generate_upper_constraints.sh: Downloading from 'https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt'
2018-01-19 22:00:24.245 | % Total % Received % Xferd Average Speed Time Time Time Current
2018-01-19 22:00:24.245 | Dload Upload Total Spent Left Speed
2018-01-19 22:00:24.509 | ^M 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0^M100 12144 100 12144 0 0 46000 0 --:--:-- --:--:-- --:--:-- 46174
2018-01-19 22:00:24.513 | + virtualenv /usr/share/ironic-python-agent/venv
2018-01-19 22:00:24.762 | New python executable in /usr/share/ironic-python-agent/venv/bin/python
2018-01-19 22:00:25.343 | Installing Setuptools..............................................................................................................................................................................................................................done.
2018-01-19 22:00:25.923 | Installing Pip.....................................................................................................................................................................................................................................................................................................................................done.
2018-01-19 22:00:25.925 | + /usr/share/ironic-python-agent/venv/bin/pip --version
2018-01-19 22:00:26.080 | pip 1.4.1 from /usr/share/ironic-python-agent/venv/lib/python2.7/site-packages (python 2.7)
2018-01-19 22:00:26.088 | + /usr/share/ironic-python-agent/venv/bin/pip install -c bob bob
2018-01-19 22:00:26.226 |
2018-01-19 22:00:26.226 | Usage:
2018-01-19 22:00:26.226 | pip install [options] <requirement specifier> ...
2018-01-19 22:00:26.226 | pip install [options] -r <requirements file> ...
2018-01-19 22:00:26.226 | pip install [options] [-e] <vcs project url> ...
2018-01-19 22:00:26.226 | pip install [options] [-e] <local project path> ...
2018-01-19 22:00:26.226 | pip install [options] <archive url/path> ...
2018-01-19 22:00:26.228 |
2018-01-19 22:00:26.228 | no such option: -c

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/535983

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/535983
Committed: https://git.openstack.org/cgit/openstack/diskimage-builder/commit/?id=34ff72f2530ed8925c8b5d71371808d39986866f
Submitter: Zuul
Branch: master

commit 34ff72f2530ed8925c8b5d71371808d39986866f
Author: Mark Hamzy <email address hidden>
Date: Fri Jan 19 13:08:13 2018 -0600

    upgrade pip before using -c option

    The installed pip can be an older version which does not support
    the -c argument. Therefore, upgrade pip before using -c.

    Change-Id: If18d8ea822a62c8551c9c4d47354d58b0299fed2
    Closes-Bug: 1744403