[Backport] 8235356: [TESTBUG] Disable 'producer is alive' check in JFR TestCrossProcessStreaming

Summary:

Test Plan: jdk/jfr

Reviewed-by: yuleil

Issue: https://github.com/alibaba/dragonwell8/issues/112

test/jdk/jfr/api/consumer/streaming/TestCrossProcessStreaming.java

@@ -152,8 +152,9 @@ public class TestCrossProcessStreaming {
 
         // Expected that some portion of events emitted by the producer are delivered
         // to the consumer while producer is still alive, at least one event for certain.
-        Asserts.assertLTE(1, ce.whileProducerAlive.get(),
-                           "Too few events are delivered while producer is alive");
+        // Assertion below is disabled due to: JDK-8235206
+        // Asserts.assertLTE(1, ce.whileProducerAlive.get(),
+        //                   "Too few events are delivered while producer is alive");
     }
 
     private static long pid;