Create new edk2-test repository.  This repository provides test
infrastructure and test cases to test EDK II based firmware.
The test cases provide core and platform developers the ability
to test changes before commits are made and also provide a place
to add new test cases for new features and functionality.

Add Readme.md, Contributions.txt, License.txt, and .gitignore.

Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1