Added missing pingpong tests to cloud prod test
Cleaned up test output and inserted them into a google.visualization.Datatable object

- automates the disk partitioning described in
  https://cloud.google.com/compute/docs/disks/persistent-disks#repartitionrootpd

Removes an unnecessary semi-colon

- Had to add support for files and environment variables as well.
- I can't compile on windows so I'm sure there will be some issues.
- Tested end-to-end with the simple ssl fullstack test.

I tried actually doing a build on my home desktop, and none of these
run with python 3.3, which is /usr/bin/python on my home desktop.

Adding timeout for each test run so that failed tests do not block the running of the rest of the tests.

There may be a way to use third_party's protobuf (and this
may eventually be necessary) but I haven't yet figured out
how to do it correctly. It can happen later.

The source code is moved from src/python to
src/python/src. A setup.py is added at
src/python. The build_python.sh and
run_python.sh scripts are updated to build
and run the Python tests by building a
package and installing it in the developer's
Python 2.7 virtual environment.

Refactor the code a little to make this easier to munge around.

The images seem to have been broken starting with 12e12a39, but the
removal of Maven support from grpc-java also broke them further.

SSH handling no longer uses $HOME as it does not agree with /etc/passwd
in older docker versions[1] and prevented SSH from seeing the config
file.

Some effort was also made to reduce the image sizes by removing
temporary files.

1. https://github.com/docker/docker/issues/2968

refactoring will happen when the commands are final.