Run e-r batch jobs twice an hour ten minutes apart

Decrease the time between e-r batch jobs to half an hour between
consecutive runs of the same job to reduce the latency on the updates of
these reports. Offset each of the three batch jobs from each other by
ten minutes. The run times look like this now:

  minute: 0 10 20 30 40 50
  job:    1  2  3  1  2  3

Change-Id: Ic4176b019e6da71e8c1e33ca89f53b6700309a91
Merge "Run e-r batch jobs twice an hour ten minutes apart"