Fix flaky org.apache.cxf.io.DelayedCachedOutputStreamCleanerTest.test…

…CleanOnShutdownDisabled test case (OpenJ9)

(cherry picked from commit 8684601)
(cherry picked from commit daf5620)

core/src/test/java/org/apache/cxf/io/DelayedCachedOutputStreamCleanerTest.java

@@ -166,9 +166,9 @@ public void testCleanOnShutdown() throws InterruptedException {
 
     @Test
     public void testCleanOnShutdownDisabled() throws InterruptedException {
-        /* Delay of 2.5 seconds */
+        /* Delay of 3 seconds */
         final Map<String, Object> properties = new HashMap<>();
-        properties.put(CachedConstants.CLEANER_DELAY_BUS_PROP, 2500); /* 2.5 seconds */
+        properties.put(CachedConstants.CLEANER_DELAY_BUS_PROP, 3000); /* 3 seconds */
         properties.put(CachedConstants.CLEANER_CLEAN_ON_SHUTDOWN_BUS_PROP, false);
         bus = new ExtensionManagerBus(new HashMap<>(), properties);
 
@@ -182,7 +182,7 @@ public void testCleanOnShutdownDisabled() throws InterruptedException {
         bus.shutdown(true);
 
         // The Closeable::close should not be called since timer(s) is cancelled
-        await().during(3, TimeUnit.SECONDS).untilAtomic(latch, is(false));
+        await().during(4, TimeUnit.SECONDS).atMost(5, TimeUnit.SECONDS).untilAtomic(latch, is(false));
     }
 
     @Test