Added delete log to integration test

Author: ThomasArdal

test/Elmah.Io.Client.Test/IntegrationTest.cs

@@ -71,6 +71,14 @@ public void Test()
             var result = api.Logs.Diagnose(created.Id);
             Assert.That(result.Count, Is.EqualTo(0));
 
+            // Delete
+            api.Messages.DeleteAll(created.Id, new Search { Query = "*" });
+            Thread.Sleep(2000);
+
+            api.Logs.Delete(created.Id);
+            Thread.Sleep(2000);
+            Assert.That(api.Logs.GetAll().Count == logs.Count);
+
             #endregion
 
             #region SourceMaps