Move ImageId above UserData
Move ImageId above UserData

It's nice to have UserData last in that stanza since it's a pretty big section.

Signed-off-by: Ken Simon <d689d7adec1f250ae6789ab10f904ed792f264cd@gmail.com>

heptio/aws-quickstart,captainshar/aws-quickstart,heptio/aws-quickstart