dsc_resource: module_name mandatory when module_version is specified.

[MichaelStankiewicz]

If you specify the module_version parameter, you MUST also specify the module_name parameter as well. However the documentation as currently worded, implies that if module_name is not supplied, the module name will be inferred, suggesting that the property is not mandatory when in fact it is (at least when a module_version is also specified).

The wording should be updated to state that when module_version is specified, then module_name is required.

Per the current documentation:

module_name
Ruby Type: String

The name of the module from which a DSC resource originates. If this property is not specified, it will be inferred.