Fixed netfx System.Threading.Tasks.Tests fails on non-English Windows (…

…dotnet/corefx#28351)

* Fixed netfx System.Threading.Tasks.Tests fails on non-English Windows

* Removed RemoteInvoke. Replaced Contains on pattern match.

* Removed RemoteInvoke. Replaced Contains on pattern match.


Commit migrated from dotnet/corefx@3e5bf71

src/libraries/System.Threading.Tasks/tests/System.Runtime.CompilerServices/AsyncTaskMethodBuilderTests.cs

@@ -544,7 +544,7 @@ private static void ValidateException(Exception e)
         {
             Assert.NotNull(e);
             Assert.NotNull(e.StackTrace);
-            Assert.Contains("End of stack trace", e.StackTrace);
+            Assert.Matches(@"---.+---", e.StackTrace);
         }
 
         private class TrackOperationsSynchronizationContext : SynchronizationContext