unify loggers used by Grpc tests

src/csharp/Grpc.Core.Tests/NUnitMain.cs

@@ -33,7 +33,7 @@ namespace Grpc.Core.Tests
         public static int Main(string[] args)
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
-            GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
+            GrpcEnvironment.SetLogger(new ConsoleLogger());
 #if NETCOREAPP1_0
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else

src/csharp/Grpc.Examples.Tests/NUnitMain.cs

@@ -33,7 +33,7 @@ namespace Grpc.Examples.Tests
         public static int Main(string[] args)
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
-            GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
+            GrpcEnvironment.SetLogger(new ConsoleLogger());
 #if NETCOREAPP1_0
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else

src/csharp/Grpc.HealthCheck.Tests/NUnitMain.cs

@@ -33,7 +33,7 @@ namespace Grpc.HealthCheck.Tests
         public static int Main(string[] args)
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
-            GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
+            GrpcEnvironment.SetLogger(new ConsoleLogger());
 #if NETCOREAPP1_0
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else

src/csharp/Grpc.IntegrationTesting/NUnitMain.cs

@@ -33,7 +33,7 @@ namespace Grpc.IntegrationTesting
         public static int Main(string[] args)
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
-            GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
+            GrpcEnvironment.SetLogger(new ConsoleLogger());
 #if NETCOREAPP1_0
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else

src/csharp/Grpc.Microbenchmarks/Program.cs

@@ -27,7 +27,7 @@ namespace Grpc.Microbenchmarks
     {
         public static void Main(string[] args)
         {
-            GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
+            GrpcEnvironment.SetLogger(new ConsoleLogger());
             var benchmark = new SendMessageBenchmark();
             benchmark.Init();
             foreach (int threadCount in new int[] {1, 1, 2, 4, 8, 12})

src/csharp/Grpc.Reflection.Tests/NUnitMain.cs

@@ -33,7 +33,7 @@ namespace Grpc.Reflection.Tests
         public static int Main(string[] args)
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
-            GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
+            GrpcEnvironment.SetLogger(new ConsoleLogger());
 #if NETCOREAPP1_0
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else