Add separate log file for debugging service

This change adds a new log file for the debugging service called
"DebugService.log".  This log file will be taken back out once we have the
debugging service running in the same process as the language service.

Author: daviwil

src/PowerShellEditorServices.Transport.Stdio/Request/InitializeRequest.cs

@@ -2,6 +2,7 @@
 using Microsoft.PowerShell.EditorServices.Transport.Stdio.Event;
 using Microsoft.PowerShell.EditorServices.Transport.Stdio.Message;
 using Microsoft.PowerShell.EditorServices.Transport.Stdio.Response;
+using Microsoft.PowerShell.EditorServices.Utility;
 using Nito.AsyncEx;
 using System.Threading.Tasks;
 
@@ -14,6 +15,12 @@ public override async Task ProcessMessage(
             EditorSession editorSession, 
             MessageWriter messageWriter)
         {
+            // TODO: Remove this behavior in the near future --
+            //   Create the debug service log in a separate file
+            //   so that there isn't a conflict with the default 
+            //   log file.
+            Logger.Initialize("DebugService.log", LogLevel.Verbose);
+
             // Send the Initialized event first so that we get breakpoints
             await messageWriter.WriteMessage(
                 new InitializedEvent());