add placement_group as an option for autoscaling groups

[dayer4b]

I believe this should accept the name of the placement group in question:

http://docs.aws.amazon.com/cli/latest/reference/autoscaling/create-auto-scaling-group.html

--placement-group (string)

The name of the placement group into which you'll launch your instances, if any. For more information, see Placement Groups in the Amazon Elastic Compute Cloud User Guide .

I'll try to make a pull request

[stack72]

ah @dayer4b, my apologies. I just opened a PR for this before I saw you had done so too. I will close mine and add some comments to yours

[stack72]

This was merged in #3704

[ghost]

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