Documentation: Add missing plugin in-tree testing
Documentation: Add missing plugin in-tree testing

Change-Id: I1ea64376ad5294558b045865a107c694c682a46e

GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser