Microsoft.OData.Core 6.9.0

New Features: 1. [GitHub issue #7, #24, #25] • ODataUriParser now can parse the complex value, entity, entity reference and a collection of them as function parameter alias. • OData Client for .NET now supports function taking complex values, entity, entity reference and collection of them as parameter. 2. [GitHub issue #33] ODataLib now supports custom payload format, including: • Support resolving custom media types for request and response messages • Support reading and writing following kinds of payload in custom payload format: - Feed - Entry - Property - Collection - Parameter - Error Improvements: 1. [GitHub issue #12] OData Client for .NET supports using DELETE http method in DataServiceContext.Execute method. Bug Fixes: 1. [GitHub issue #2] Fix a bug that model validation fails when complex type is marked as abstract in Edm model. 2. [GitHub issue #15] Fix a bug that ODataQueryOptionParser doesn't work on case insensitive query option if OData Uri resolver enables case insensitive 3. [GitHub issue #20] Fix a bug that client does not annotate the derived complex value in a collection with odata.type annotation.