Fix warnings and errors

Author: danielmarbach

src/TimeoutMigrationTool.ASQ.IntegrationTests/ASQTargetTests.cs

@@ -391,7 +391,6 @@ public async Task Staging_with_large_entities_batches_respecting_size_limitation
             var stageResult = await result.StageBatch(timeouts, 1);
 
             // Assert
-            Assert.That(stageResult, Is.Not.Null);
             Assert.That(stageResult, Is.EqualTo(timeouts.Count));
         }
 
@@ -436,7 +435,6 @@ public async Task Completing_with_large_entities_batches_respecting_size_limitat
             var completeResult = await result.CompleteBatch(1);
 
             // Assert
-            Assert.That(completeResult, Is.Not.Null);
             Assert.That(completeResult, Is.EqualTo(timeouts.Count));
         }
 

src/TimeoutMigrationTool.Tests/AbortRunnerTests.cs

@@ -32,6 +32,9 @@ public void Setup()
             timeoutsSource.SetupEndpoints(endpoints);
         }
 
+        [TearDown]
+        public async Task TearDown() => await timeoutsTarget.DisposeAsync();
+
         [Test]
         public void WhenAbortingAndTimeoutStorageFoundNothingToAbortThrowsException()
         {

src/TimeoutMigrationTool.Tests/MigrationRunnerTests.cs

@@ -31,6 +31,9 @@ public void Setup()
             timeoutsSource.SetupEndpoints(endpoints);
         }
 
+        [TearDown]
+        public async Task TearDown() => await timeoutsTarget.DisposeAsync();
+
         [Test]
         public async Task WhenRunningWithoutToolState()
         {