Updated sorting tests to test MathNet sorting

src/Numerics.Tests/SortingTests.cs

@@ -175,7 +175,8 @@ namespace MathNet.Numerics.UnitTests
             }
 
             // default sorting (Ascending)
-            list.Sort();
+            //list.Sort();
+            Sorting.Sort(list);
 
             // just check that the order is as expected, not that the items are correct
             for (var i = 1; i < list.Count; i++)