Enable Maven batch mode: (#1000)

It disables the colour output and, hopefully, disables downloading
progress output.

Fixes the issue on Travis when the Travis log size is exceeded when
the build cache is cleared and Maven needs to download all
the dependencies.

Author: dmitry-timofeev

.travis/run_travis_job.sh

@@ -41,7 +41,8 @@ else
       PARALLEL_TESTS_ENABLED="false"
     fi
     echo "--threads 1C -Djunit.jupiter.execution.parallel.enabled=${PARALLEL_TESTS_ENABLED} \
-          -Djunit.jupiter.execution.parallel.mode.default=concurrent" > \
+          -Djunit.jupiter.execution.parallel.mode.default=concurrent \
+          --batch-mode" > \
       .mvn/maven.config
 
     # Run all tests