tx dashboard generator

This PR included a tool to generate high volume dashboards (can be used in future for all the rest).

And all the dashboards that were generated.

Closes:
https://www.pivotaltracker.com/s/projects/911874/stories/67730700
https://www.pivotaltracker.com/s/projects/911874/stories/66943318
https://www.pivotaltracker.com/s/projects/911874/stories/69337900

Goes some way on:
https://www.pivotaltracker.com/s/projects/911874/stories/69337952