Added script addpartitions.gvy.
Added script addpartitions.gvy.

awslabs/aws-big-data-blog,awslabs/aws-big-data-blog,IanMeyers/aws-big-data-blog,awslabs/aws-big-data-blog,awslabs/aws-big-data-blog,awslabs/aws-big-data-blog,awslabs/aws-big-data-blog,IanMeyers/aws-big-data-blog,IanMeyers/aws-big-data-blog,IanMeyers/aws-big-data-blog,IanMeyers/aws-big-data-blog