Document how to write module tests to be included in regression test suite.

OK, makes sense.

In discussion with Niels Erik, we decided to put documentation in "ui-testing" README, and link to it from various places.

Right, @Mike Taylor, @David Crossley

The places I know of that already describe or refer to or touch on this:

ui-testing itself: https://github.com/folio-org/ui-testing/blob/master/README.md

The UI release procedure: https://github.com/folio-org/stripes-core/blob/master/doc/release-procedure.md#notes-on-testing

https://github.com/folio-org/stripes-core/blob/master/doc/dev-guide.md#unit-testing

http://dev.folio.org/community/contrib-code#automation

Seems to me like it belongs in https://github.com/folio-org/stripes-core/blob/master/doc/dev-guide.md – it's Stripes-specific, not something about being a FOLIO contributor in general. Agree, @David Crossley?

@David Crossley @Mike Taylor Guys, let's decide where the above documentation should be incorporated (also https://folio-org.atlassian.net/browse/FOLIO-806#icft=FOLIO-806, STRIPES-461): dev.folio.org CONTRIBUTING guildelines or Stripes developer's guide.