Gradle presubmit not running all tests

[kennknowles]

For PR #4829

The following test failed (flakily) and succeeded on retry in Maven:

https://builds.apache.org/job/beam_PreCommit_Java_MavenInstall/org.apache.beam$beam-runners-direct-java/18505/testReport/org.apache.beam.sdk.io/FileIOTest/testMatchWatchForNewFiles/

 

While investigating the original failure, I was unable to find it in the logs of the Gradle presubmit, making we worry that it may not be covering all tsets.

Imported from Jira BEAM-3825. Original Jira may contain additional context.
Reported by: bchambers.