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Add Mtom support in WCF runtime

See original GitHub issue

I am getting the following error when using the Visual Studio WCF Connected Service extension for Visual Studio 2017:

Scaffolding Code ...
Error:Warning: The following Policy Assertions were not Imported:   XPath://wsdl:definitions[@targetNamespace='http://imaging.oracle/']/wsdl:binding[@name='DocumentContentServicePortBinding']
  Assertions:
    <ns1:OptimizedMimeSerialization xmlns:ns1='http://schemas.xmlsoap.org/ws/2004/09/policy/optimizedmimeserialization'>..</ns1:OptimizedMimeSerialization>
Warning: Unsupported binding element type: 'System.ServiceModel.Channels.UnrecognizedAssertionsBindingElement'.
Warning: Unsupported message encoding element type: 'System.ServiceModel.Channels.MtomMessageEncodingBindingElement'. It must be one of the following types: 'System.ServiceModel.Channels.BinaryMessageEncodingBindingElement', 'System.ServiceModel.Channels.TextMessageEncodingBindingElement.'
Warning: Endpoint 'DocumentContentServicePort' at address 'http://localhost/imaging/ws/DocumentContentService' contains one or more bindings not compatible with .Net Core apps, skipping...
Error: No endpoints compatible with .Net Core apps were found.
Failed to generate service reference.

The WSDL/XSD file causing the issue: DocumentContentService.xsd.txt DocumentContentService.wsdl.txt

dotnet --info

.NET Command Line Tools (1.0.0)

Product Information:
 Version:            1.0.0
 Commit SHA-1 hash:  e53429feb4

Runtime Environment:
 OS Name:     Windows
 OS Version:  6.1.7601
 OS Platform: Windows
 RID:         win7-x64
 Base Path:   C:\Program Files\dotnet\sdk\1.0.0