Issue with Domain Join ARM template when OU is specified which contains a space

201-vm-domain-join

### Issue Details
When using JsonADDomainExtension and specifying an OU, the domain join process fails if the name of the OU contains a space.
Example: "value": "\"OU=Member Servers,DC=contoso,DC=local\""

In the NetSetup log on the machine, the failure reason is: NetpProvisionComputerAccount: Cannot retry downlevel, specifying OU is not supported

Start with the 201-vm-domain-join template and inspect its JsonADDomainExtension configuration, focusing on the OU value shown in the issue. Reproduce the domain join with an OU containing a space and review the NetSetup log for the reported failure. Done means the template handles that OU value without the domain join failing.

Written by the indexing model from the issue text.