Convert Lettuce 4.0 tests from groovy to java

[jaydeluca]

Related to #7195

A few notes:

• The groovy tests were spinning up a new redis container for every test. I have changed things a bit where for each class all tests will share the same container with the exception of the two tests per class that invoke commands that result in the redis container crashing. Those tests spin up their own containers.
  • I tested the speed difference of the new tests vs old and the new tests run in under 4s on my computer where the previous tests take ~12 seconds 💪
• The groovy tests used a spock helper class spock.util.concurrent.AsyncConditions, which I ended up re-creating, but if there's another existing class or strategy I should use in place of that, please let me know and I can make those adjustments Updated to use Awaitibility

[mateuszrzeszutek]

• I tested the speed difference of the new tests vs old and the new tests run in under 4s on my computer where the previous tests take ~12 seconds 💪

Awesome! 🚀

• The groovy tests used a spock helper class spock.util.concurrent.AsyncConditions, which I ended up re-creating, but if there's another existing class or strategy I should use in place of that, please let me know and I can make those adjustments

We usually use awaitility for these kinds of things. AFAIR it should even be automatically imported in the testing-common module.

[mateuszrzeszutek]

Instead of that you could use either an AtomicReference or a CompletableFuture that you would set from the redisFuture.thenAccept() callback; and then assert on that ref/future using Awaitility.await()

[jaydeluca]

thank you for this suggestion, I believe I have implemented the proposed change

[mateuszrzeszutek]

This is looking great, thanks! Left just a couple small comments

[mateuszrzeszutek]

Nit: JUnit 5 test lifecycle methods need not be public

Suggested change

	public static void setUp() {
	static void setUp() {

[mateuszrzeszutek]

It'd be safer to use the AutoCleanupExtension; the connection would get closed even if the assertion fails.