normalize folder

Author: roei sabag

src/csharp/Gravity.Abstraction.Logging/Gravity.Abstraction.Logging/TraceLogger.cs

@@ -98,7 +98,7 @@ private void SetupTraceListener(string instanceName, string inDirectory)
                 : inDirectory;
 
             // initialize listener
-            Directory.CreateDirectory($"{directory}\\logs".Replace("\\\\", "\\").Replace("//", "/"));
+            Directory.CreateDirectory(directory.Replace("\\\\", "\\").Replace("//", "/"));
 
             // setup conditions
             var exists = System.Diagnostics.Trace