BDB JE tuning

* BdbModule.java
    increase je.log.faultReadSize from 2K to 6K -- stats showed many faults (ideal is zero)

commons/src/main/java/org/archive/bdb/BdbModule.java

@@ -257,6 +257,8 @@ Serializable, Closeable {
         }
         config.setConfigParam("je.lock.nLockTables", Long.toString(nLockTables));
         
+        // triple this value to 6K because stats show many faults
+        config.setConfigParam("je.log.faultReadSize", "6144");
         f.mkdirs();
         this.bdbEnvironment = new EnhancedEnvironment(f, config);