Document CLI acceptance test type

[phil-davis]

What Type Of Content Change Is This?

• New Content Addition
• Old Content Deprecation
• Existing Content Simplification
• Bug Fix to Existing Content

Which Manual Does This Relate To?

• Admin Manual
• Developer Manual
• User Manual

What Needs to be Documented?

Currently there are 2 categories of acceptance tests - API and webUI

Core PR owncloud/core#33041 proposes adding a 3rd category - CLI acceptance tests.
Related QA issue owncloud/QA#570

Why Should This Change Be Made?

So the docs reflect reality.

[settermjd]

Thanks for creating this @phil-davis. I'll get it addressed.

[phil-davis]

Related core PR has been merged. This is a development environment "extra/new feature", so it is effectively "released" when the PR is merged.
But no huge hurry for the docs - we are only just making new acceptance tests of type cli

[phil-davis]

The essential changes are in #155

A bigger rewrite of "advice" on designing and writing acceptance tests is for issue #156