Ensure wiki cohorts work

Bug: 66290
Change-Id: I6fd6ddc56d8eafd2497406076b8c26a05d6cb0f3
Remove useless scripts

Change-Id: I2319c59065a8a209fb73e0a0ed31a5cc31f0a836
Add script to bulk insert cohorts or reports

Bug: 65946
Change-Id: I41aa48f0ae39aac5a8ca9be9bd5c256e1aaaf552
Merge changes I41aa48f0,I2319c590,I6fd6ddc5

* changes:
  Add script to bulk insert cohorts or reports
  Remove useless scripts
  Ensure wiki cohorts work