HCOLL-263 assume direct off-heap impls only used if fails to generate generic off-heap/on-heap readers/writers

src/test/java/net/openhft/chronicle/map/fromdocs/OpenJDKAndHashMapExamplesTest.java

@@ -56,7 +56,7 @@ public class OpenJDKAndHashMapExamplesTest {
         file.deleteOnExit();
 
         ChronicleMap<String, BondVOInterface> chm = ChronicleMapBuilder
-                .of(String.class, DataValueClasses.directClassFor(BondVOInterface.class))
+                .of(String.class, BondVOInterface.class)
                 .keySize(10)
                 .createPersistedTo(file);