add task summary table

Add the task summary table in job view. When job success filter (not propagating successful job information due to couch size problem), we won't be able  some of the information about successful jobs by task.
This patch is created on ops urgent request.
It will display job status and numbers for each tasks as well as event progress and lumi progress.
However, lumi/event progress is currently only recorded for merge jobs so other tasks will show 0%.
Some of the old document won't have task information since this wasn't in the initial requirements. In that case, empty table will be displayed.

Eric, please review.