Expose the docker build_arg to build.py

[OpenStack Infra]

https://review.openstack.org/266870
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/kolla" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit 7093d37f1825182366939cf64faa477040d29aa2
Author: Jeffrey Zhang <email address hidden>
Date: Fri Jan 8 10:13:39 2016 +0800

    Expose the docker build_arg to build.py

    With this implement, we can add variables at building stage.
    For example, add HTTP_PROXY and NO_PROXY when needed like below.

        build.py --build-args \
            HTTP_PROXY:http://127.0.0.1:8080,NO_PROXY:127.0.0.1

    More info about build_arg, pls check[0]

    [0] https://docs.docker.com/engine/reference/commandline/build/#set-build-time-variables-build-arg

    DocImpact

    Implements: bp add-buildargs
    Change-Id: I29ed7f536670fef59d697603dc562a69d90743c9

[Hui Kang (huikang27)]

My latest build image command fails due to this commit.

/root/development/kolla/tools/build.py openstack-base
INFO:__main__:Found the docker image folder at /root/development/kolla/docker
INFO:__main__:base:Building
Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/root/development/kolla/tools/build.py", line 146, in run
    self.builder(image)
  File "/root/development/kolla/tools/build.py", line 270, in builder
    buildargs=self.conf.build_args):
TypeError: build() got an unexpected keyword argument 'buildargs'

[Kuo-tung Kao (jelly) (coding1314)]

@Hui Kang

The issue you hit is that the docker-py version is too old. Try to upgrade to 1.6.0

[Launchpad Janitor (janitor)]

[Expired for kolla because there has been no activity for 60 days.]