### What changes were proposed in this pull request?
This patch changes ReceiverSuite."receiver_life_cycle" to record actual calls with timestamp in FakeReceiver/FakeReceiverSupervisor, which doesn't rely on timing of stopping and starting receiver in restarting receiver. It enables us to give enough huge timeout on verification of restart as we can verify both stopping and starting together.
### Why are the changes needed?
The test is flaky without this patch. We increased timeout to fix flakyness of this test (15adcc8273) but even with longer timeout it has been still failing intermittently.
### Does this PR introduce any user-facing change?
No
### How was this patch tested?
I've reproduced test failure artificially via below diff:
```
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisor.scala b/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisor.scala
index faf6db82d5..d8977543c0 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisor.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisor.scala
-191,9 +191,11 private[streaming] abstract class ReceiverSupervisor(
// thread pool.
logWarning("Restarting receiver with delay " + delay + " ms: " + message,
error.getOrElse(null))
+ Thread.sleep(1000)
stopReceiver("Restarting receiver with delay " + delay + "ms: " + message, error)
logDebug("Sleeping for " + delay)
Thread.sleep(delay)
+ Thread.sleep(1000)
logInfo("Starting receiver again")
startReceiver()
logInfo("Receiver started again")
```
and confirmed this patch doesn't fail with the change.
Closes#25862 from HeartSaVioR/SPARK-23197-v2.
Authored-by: Jungtaek Lim (HeartSaVioR) <kabhwan@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
a1b90bfc0f