cloudera-on-centos does not run because Item is not supported in Microsoft.Compute/virtualMachines/extensions|properties|protectedSettings

cloudera-on-centos(https://github.com/Azure/azure-quickstart-templates/tree/master/cloudera-on-centos)
### Issue Details

Template cloudera-on-centos/setup-cloudera.json the new CustomScript handler does not suppert Item as sub property of protectedSettings. This fails the execution of the template. In all scripts from this project change
https://github.com/Azure/azure-quickstart-templates/commit/68e6902fe5ddfa4b9cdc851102b977c496e11972 can be undone. Or an alternative should be found for the Item property.
### Repro steps (_if necessary, delete otherwise_)
1. run the template

Start with cloudera-on-centos/setup-cloudera.json and review the CustomScript handler's protectedSettings usage, including the change introduced by commit 68e6902fe5ddfa4b9cdc851102b977c496e11972. Run the cloudera-on-centos template to reproduce the unsupported Item error; done means the template executes successfully with the supported settings format.

Written by the indexing model from the issue text.