Writing undeclared untyped properties to open types fails.

[mikepizzo]

Writing an undeclared untyped property to an open entity fails

Assemblies affected

ODL V7

Reproduce steps

1. Define an open entity type
2. Attempt to write an undefined property:
   new ODataProperty { Name = "UndeclaredProperty", Value = new ODataUntypedValue { RawValue = ""rawValue"" }) };

Expected result

The undeclared property should be written since the type is open

Actual result

Error Message "The property 'OpenCollectionNoType' does not exist on type 'microsoft.graph.S1E2'. Make sure to only use property names that are defined by the type or mark the type as open type."

Additional detail

This works for undefined typed properties in an open entity type, it's only an issue for untyped properties.
This worked in ODL V6 and is blocking folks from moving to ODL V7.

[mikepizzo]

Fixed by change #1010.