Fix Clustering.ConnectMembersTests.TestDelayedQue (#1020)

closes #1018 

The `MemberRequest` and queue were using different time sources, that
was causing slightly differences in new runtimes due to their better
performance. Now, both are using same source, there is no differences
anymore.

Author: emreyigit

src/Hazelcast.Net.Tests/Clustering/ConnectMembersTests.cs

@@ -246,9 +246,12 @@ await AssertEx.SucceedsEventually(() =>
             cancellation.Cancel();
             await connecting.CfAwaitCanceled();
 
-            // each member retried twice = twice the 1s delay = 2s
+            // each member retried twice = twice the ~1s delay ~ 2s
             // we should not have completed faster than that, even so the code runs fully in-memory
-            Assert.That(elapsed, Is.GreaterThanOrEqualTo(TimeSpan.FromSeconds(2)));
+            // Note: The queue has 10ms error margin per wait, so we take 20ms total margin for two unsuccessful tries
+            var failedCount = successCount - 1;
+            var expectedMinTotalDelay = TimeSpan.FromMilliseconds(failedCount * 990); // 990ms per failed try including 10ms margin
+            Assert.That(elapsed, Is.GreaterThanOrEqualTo(expectedMinTotalDelay));
             HConsole.WriteLine(this, $"Elapsed: {elapsed}");
 
             Assert.That(queue.Count, Is.EqualTo(0));