oms-azure-vminventory-solution

(https://github.com/Azure/azure-quickstart-templates/tree/master/oms-azure-vminventory-solution/)

### Issue Details
Receiving null error during template deployment. Attempted this against both a personal account and an internal MS account with no luck.

Start with the oms-azure-vminventory-solution template at the linked repository path and reproduce its deployment in an Azure account. Capture the full deployment error and compare behavior across the reported account types; done means the template deploys successfully or the failure is documented with a clear cause and reproduction steps.

Written by the indexing model from the issue text.