Use gradle docker image for more resilient builds.

6 jobs for istjnscae-master-patch-02463 in 2 minutes and 40 seconds (queued for 22 seconds)
latest
Status Name Job ID Coverage
  Build
passed build #131233

00:00:42

 
  Check
passed checkstyle_main #131244

00:00:58

passed checkstyle_test #131235

00:00:55

passed spotbugs_main #131236

00:00:56

passed spotbugs_test #131237

00:00:58

failed checkstyle_main #131234

00:00:50