[Docs]Update tachyon.data.folder and tachyon.workers.folder default value

Configuration-Settings.html and `TACHYON_JAVA_OPTS` in tachyon-env.sh.template description is not consistent, 
update  `tachyon.data.folder` default value is `$TACHYON_UNDERFS_ADDRESS/tmp/tachyon/data` 
and `tachyon.workers.folder` default value is `$TACHYON_UNDERFS_ADDRESS/tmp/tachyon/workers` in Configuration-Settings.html.