Prasad Katti 30fd1870f3 [docs] Clean up the cloudformation examples (#31770) ...

- added `role_arn` to the "role example" example
- removed the irrelevant parameters to the "role example" example
- updated comment on one of the examples
- removed the last example as it was a duplicate of "role example" example
- some other minor changes

2017-10-16 08:53:10 -04:00

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[docs] Clean up the cloudformation examples (#31770)

2017-10-16 08:53:10 -04:00