Revert "Config UI: Change stage summary to include stage progress, running time"

This reverts commit eba6cb4ae7f5171a88f8db1fceb6396cf48a5efe.
Revert "Update freemarker version to 2.3.20"

This reverts commit 2d597f4fe98b4c6834789b4ddfc3f6707beb612e.
revert the update to freemarker library

Signed-off-by: ywang19 <yaguang.wang@intel.com>