Tune the pausers

src/test/java/net/openhft/chronicle/map/TCPSocketReplicationNativeTest.java

@@ -40,6 +40,7 @@ import static org.junit.Assert.assertTrue;
 
 public class TCPSocketReplicationNativeTest {
 
+    Set<Thread> threads;
     private ChronicleMap<Integer, LongValue> map1;
     private ChronicleMap<Integer, LongValue> map2;
 
@@ -65,7 +66,8 @@ public class TCPSocketReplicationNativeTest {
 
         for (final Closeable closeable : new Closeable[]{map1, map2}) {
             try {
-                closeable.close();
+                if (closeable != null)
+                    closeable.close();
             } catch (Exception e) {
                 e.printStackTrace();
             }
@@ -73,8 +75,6 @@ public class TCPSocketReplicationNativeTest {
         System.gc();
     }
 
-    Set<Thread> threads;
-
     @Before
     public void sampleThreads() {
         threads = Thread.getAllStackTraces().keySet();