MaxCtrl object creation doesn't convert values to JSON

The parameters for the create commands are not converted from strings to their JSON equivalents. This mainly affects boolean values as they were sent as JSON strings, not JSON boolean values.

Since the alter commands to handle it correctly, a workaround to this is to first create the object and then alter the boolean parameters. This issue does not affect 2.5 as much as it does future releases where the configuration is done with the raw JSON values without first being converted into strings.