Cleanup Lucene snapshot JAR files (#88)

Author: gbanasiak

cars/v1/vanilla/config.ini

@@ -1,5 +1,8 @@
 [variables]
-clean_command = ./gradlew --no-daemon clean
+# Gradle clean is preceded with removal of Lucene snapshot JAR files which
+# may change content/hash but not the filename which can fail the build. This
+# might be removed once Lucene produces archives in a reproducible way.
+clean_command = find ~/.gradle/caches -name 'lucene-*-snapshot-*.jar' -delete; ./gradlew --no-daemon clean
 # deprecated
 build_command = ./gradlew :distribution:archives:linux-tar:assemble
 # new