Merge branch 'tc-testing-plugin-architecture'

Brenda J. Butler says:

====================
tools: tc-testing: Plugin Architecture

To make tdc.py more general, we are introducing a plugin architecture.

This patch set first organizes the command line parameters, then
introduces the plugin architecture and some example plugins.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>