V3 service.dll needs handle undeclared collection properties

[challenh]

V3 ODL supports reading undeclared collection properties starting from 5.6.4, but service.dll doesn't handle it well :
(1) when service.dll is able to read and proceed it, service.dll will try to write undeclared collection properties which is not supported yet.
(2) so previously http 400 is explicitly thrown when checking & reading undeclared collection properties, now this step can pass, then later on a write attempt will cause http 500.

[congysu]

This is a Flag enum type. We might need to add a new flag, instead of re-defining behavior for existing flags.

[congysu]

The Flag enum is: ODataUndeclaredPropertyBehaviorKinds
https://github.com/OData/odata.net/blob/ODATAV3/ODataLib/OData/Desktop/.Net4.0/Microsoft/Data/OData/ODataUndeclaredPropertyBehaviorKinds.cs#L30

[challenh]

close it. f1934b3