fixed broken tests

NzbDrone.Core.Test/Fixtures.cs

@@ -33,6 +33,7 @@ namespace NzbDrone.Core.Test
             {
                 try
                 {
+
                     File.Delete(file);
                 }
                 catch

NzbDrone.Core.Test/JobProviderTest.cs

@@ -92,6 +92,7 @@ namespace NzbDrone.Core.Test
             var timerProvider = mocker.Resolve<JobProvider>();
             timerProvider.Initialize();
             var firstRun = timerProvider.RunScheduled();
+            Thread.Sleep(2000);
             var secondRun = timerProvider.RunScheduled();
 
             Assert.IsTrue(firstRun);