Revert "Use 20 second latch for this test to see how it goes with CI"

This reverts commit 3e4f68b.

src/test/java/io/vertx/test/core/AsyncTestBase.java

@@ -589,11 +589,7 @@ protected <T> Handler<AsyncResult<T>> onFailure(Consumer<Throwable> consumer) {
   }
 
   protected void awaitLatch(CountDownLatch latch) throws InterruptedException {
-    awaitLatch(latch, 10);
-  }
-
-  protected void awaitLatch(CountDownLatch latch, int numSecs) throws InterruptedException {
-    assertTrue(latch.await(numSecs, TimeUnit.SECONDS));
+    assertTrue(latch.await(10, TimeUnit.SECONDS));
   }
 
   protected void waitUntil(BooleanSupplier supplier) {

src/test/java/io/vertx/test/core/HttpTest.java

@@ -4161,7 +4161,7 @@ public void testContexts() throws Exception {
         }
       }).exceptionHandler(this::fail).end();
     }
-    awaitLatch(latch2, 20);
+    awaitLatch(latch2);
     // Close should be in own context
     server.close(ar -> {
       assertTrue(ar.succeeded());