Use of "double quotes" to define OU path

201-vm-domain-join-exiting (https://github.com/Azure/azure-quickstart-templates/tree/master/201-vm-domain-join-existing)

### The parameter 'ouPath' metadata suggests using "double quotes" in the OU path which causes the deployment to fail.

### Repro steps
1. Remove the "double quotes" from the parameter 'ouPath' metadata.

Open the 201-vm-domain-join-existing template linked in the issue and inspect the metadata for the ouPath parameter. Verify how the double quotes are shown and remove them, then confirm that the domain-join deployment no longer fails when the OU path is used.

Written by the indexing model from the issue text.