Add us-east-2

[rgfindl]

hi, Awesome yaml files on creating EKS cluster using cloud formation templates. EKS is now available in ohio us-east-2 ,so the script needs to be updated to create worker nodes in that region..theres a new AMI for that region on aws documentation.thanks for all you do.

[isioma42]

hi..good to know this is undergoing enhancement. looking forward to the updated version. thanks for all you do.