How to set timeZone in druid-0.12.0?

I import data from tranquility or HDFS to druid-0.12.0 and find all data store with UTC timeZone although i have set -Duser.timezone=GMT+8 in druid, but it works fine in 0.9.2. how can i set this timeZone in druid-0.12.0? anyone who have a good solution? i have also published this to github https://github.com/druid-io/druid/issues/5783