Update freemarker version to 2.3.20

Signed-off-by: Khushbu Shrivastava <khushbu.shrivastava@intel.com>
Config UI: Change stage summary to include stage progress, running time

Decription: The stage summary today shows just the stage
name or a sequence of names in case there are multiple
workloads.  For brevity, it should show -

   name of the current stage
   stage#/total stages
   time remaining in the current stage

Also, possibly -

   time elapsed since the start of the test
   total estimated time for the test run

This addresses issue#192

Signed-off-by: Khushbu Shrivastava <khushbu.shrivastava@intel.com>