[#90126184]  - (Simpler approach -- just add an ID to the image )
[#90126184]  - (Simpler approach -- just add an ID to the image )

The snapshot tool needs to find a dom ID "interactive_{id}" -- but we didn't have one

the interactive_iframe_tag helper does this for non-image interactives. see:
http://bit.ly/1byrBm4

https://www.pivotaltracker.com/story/show/90126184

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