junit.xml: no matching files in phpunit job artifacts
Problem/Motivation
When PHPUnit jobs pass, there is often still an error in the log
Uploading artifacts...
WARNING: junit.xml: no matching files. Ensure that the artifact path is relative to the working directory (/builds/issue/my_module-nnnnnn)
This is not a new fault, I think it has been happening since day 1. When the phpunit test fails, we do not get this error, because a junit.xml file is created.
Proposed resolution
As artifact files have to exist, can we just create an empty junit.xml before executing phpunit?