Unrollback change removals to integrate new changes with VSTest Integration

Author: Joseph Sun

src/coverlet.collector/DataCollection/CoverageWrapper.cs

@@ -70,5 +70,10 @@ public void PrepareModules(Coverage coverage)
     {
       coverage.PrepareModules();
     }
+
+    public void UnloadModule(Coverage coverage, string modulePath)
+    {
+      coverage.UnloadModule(modulePath);
+    }
   }
 }

src/coverlet.collector/Utilities/Interfaces/ICoverageWrapper.cs

@@ -39,5 +39,12 @@ internal interface ICoverageWrapper
     /// <param name="coverage"></param>
     void PrepareModules(Coverage coverage);
 
+    /// <summary>
+    /// Unload module in the specified path
+    /// </summary>
+    /// <param name="coverage"></param>
+    /// <param name="modulePath"> path of the module to be unloaded</param>
+    void UnloadModule(Coverage coverage, string modulePath);
+
   }
 }