I determined how to do this using the ARM pattern. Hope this helps you regarding the workbook. Here is JSON to make cluster 2.0. Pay attention to the sections clusterVersion and componentVersion.
...
"resources": [
{
"apiVersion": "2015-03-01-preview",
"name": "somename",
"type": "Microsoft.HDInsight/clusters",
"location": "northcentralus",
"dependsOn": [],
"properties": {
"clusterVersion": "3.5",
"osType": "Linux",
"tier": "standard",
"clusterDefinition": {
"kind": "spark",
"componentVersion": {
"Spark": "2.0"
},
...
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