Exclude DataFrameReaderProxy and DataFrameNaFunctionsIpcProxy from unit test coverage report

csharp/Adapter/Microsoft.Spark.CSharp/Proxy/Ipc/DataFrameNaFunctionsIpcProxy.cs

@@ -3,10 +3,12 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using Microsoft.Spark.CSharp.Interop.Ipc;
 
 namespace Microsoft.Spark.CSharp.Proxy.Ipc
 {
+    [ExcludeFromCodeCoverage] //IPC calls to JVM validated using validation-enabled samples - unit test coverage not reqiured
     internal class DataFrameNaFunctionsIpcProxy : IDataFrameNaFunctionsProxy
     {
         private readonly JvmObjectReference jvmDataFrameNaFunctionsReference;

csharp/Adapter/Microsoft.Spark.CSharp/Proxy/Ipc/DataFrameReaderIpcProxy.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -11,6 +12,7 @@ using Microsoft.Spark.CSharp.Sql;
 
 namespace Microsoft.Spark.CSharp.Proxy.Ipc
 {
+    [ExcludeFromCodeCoverage] //IPC calls to JVM validated using validation-enabled samples - unit test coverage not reqiured
     internal class DataFrameReaderIpcProxy : IDataFrameReaderProxy
     {
         private readonly JvmObjectReference jvmDataFrameReaderReference;