rpearce: Migrate Xpnode to modify_storage instead of image_size
rpearce: Migrate Win7node to modify_storage instead of image_size
rpearce: Migrate Xpnode to shorter form of modify_storage
rpearce: Modify mysql tests from image_size to modify_storage
rpearce: Modify standalone app tests from image_size to modify_storage
rpearce: Modify ci slave tests from image_size to modify_storage
rpearce: Officially retire image_size option in stacks