Stream Analytics cluster job limited to 192 rather than 216

When attempting to deploy a job into a dedicated cluster resource provisioned with 216 SU the following error is received:

```
error: Code="BadRequest" Message="The JSON provided in the request body is invalid.
Property 'streamingUnits' value '216' is not in the acceptable range from '1' to '192'."
Details=[
{
"code":"400",
"correlationId":"c32e5129-6361-4185-80f0-0e2e49da19ec",
"message":"The JSON provided in the request body is invalid. Property 'streamingUnits' value '216' is not in the acceptable range from '1' to '192'.",
"requestId":"5f2d3b56-738a-410f-983f-a285aa88a073"
}
]
```

The payload names no file, test, or entry point. Start by locating the Azure Stream Analytics API specification for the dedicated cluster's streamingUnits field and compare its range with the reported 216-SU deployment; done means the specification and validation accurately represent the reported case or explain the discrepancy.

Written by the indexing model from the issue text.