Reduce cost of NeverDefaultTest.

Author: chumer

truffle/src/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/NeverDefaultTest.java

@@ -1186,7 +1186,7 @@ public void testCacheCleanupNode() throws IllegalArgumentException, IllegalAcces
     private <T extends Node> void assertInParallel(Supplier<T> nodeFactory, ParallelObjectConsumer<T> assertions) throws InterruptedException {
         final int threads = THREADS;
         final int threadPools = 4;
-        final int iterations = 1000;
+        final int iterations = 100;
         /*
          * We create multiple nodes and run the assertions in a loop to avoid implicit
          * synchronization through the synchronization primitives when running the assertions just