Documentation for KUDO test harness.

[jbarrick-mesosphere]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Adds documentation for the KUDO test harness.

Which issue(s) this PR fixes:

Fixes #340

Special notes for your reviewer:

Depends on kudobuilder/operators#23

Does this PR introduce a user-facing change?:

* Initial release of KUDO test harness for testing Frameworks and KUDO.

[jbarrick-mesosphere]

I thought it made sense to put this after the Frameworks Repository in the list.

[orsenthil]

@jbarrick-mesosphere : It feels like this document with the concentration on frameworks should be in frameworks repo instead of the kudo repo.

What do you think about this structure:

1. Explaining integration test of kudo. Giving as much detail as required, but focused on integration testing kudo.

2. Explaining framework test, and giving a link to entire self-contained setup of framework tests in the framework repo, so that the read can follow the link and read about the test harness and test suite in the frameworks repo?

[jbarrick-mesosphere]

@jbarrick-mesosphere : It feels like this document with the concentration on frameworks should be in frameworks repo instead of the kudo repo.

What do you think about this structure:

1. Explaining  integration test of kudo. Giving as much detail as required, but focused on integration testing kudo.

2. Explaining framework test, and giving a link to entire self-contained setup of framework tests in the framework repo, so that the read can follow the link and read about the test harness and test suite in the frameworks repo?

As this is the KUDO user documentation, if anything, we should be removing the integration test information and putting it in CONTRIBUTING.md or similar.

This is for the site: https://kudo.dev/docs/

[orsenthil]

As this is the KUDO user documentation, if anything, we should be removing the integration test information and putting it in CONTRIBUTING.md or similar.

Got it. Yes, that will be better.

Testing KUDO itself, should be the README.md of the KUDO.

[jbarrick-mesosphere]

As this is the KUDO user documentation, if anything, we should be removing the integration test information and putting it in CONTRIBUTING.md or similar.

Got it. Yes, that will be better.

Testing KUDO itself, should be the README.md of the KUDO.

How's it look now?

[orsenthil]

LGTM.

Thank you!