always build Java 8 class files

1 job for master in 3 minutes and 56 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #112829
build

00:03:56

 
Name Stage Failure
failed
build Test
   dh_auto_install -O--buildsystem=gradle
mh_install -O--buildsystem=gradle
Cannot find the jar to install: util/build/libs/util-*-dev.jar
make: *** [debian/rules:5: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
debuild: fatal error at line 1182:
dpkg-buildpackage -us -uc -ui -i -I failed
gbp:error: 'debuild -i -I -uc -us' failed: it exited with 29
ERROR: Job failed: exit code 1