initializes com.mysql.jdbc.TimeUtil.timeZoneMappings if needed (Connector/J 5.x)#259

hiroyuki-sato merged 3 commits intoembulk:masterembulk/embulk-input-jdbc:masterfrom

hiroyuki-sato:topic/accept-new-timeutilhiroyuki-sato/embulk-input-jdbc:topic/accept-new-timeutilCopy head branch name to clipboard