KUDU-3371 Unify the 'rdb' directory name

Change-Id: I398bfd4a6a91d95f825362fc55c3b6c7dfe5c724
Reviewed-on: http://gerrit.cloudera.org:8080/21298
Reviewed-by: Yifan Zhang <chinazhangyifan@163.com>
Reviewed-by: KeDeng <kdeng.ke@gmail.com>
Tested-by: Yingchun Lai <laiyingchun@apache.org>
7 files changed