Clear first phase list not needed for second phase

dugan

12.14.2009 8471c6ebc211004635403d8afe1163516cfcad65

 opendj-sdk/opends/src/server/org/opends/server/backends/jeb/importLDIF/Importer.java

@@ -603,6 +603,7 @@
    {
      result.get();
    }
    indexWriterList.clear();
    execService.shutdown();
    freeBufferQueue.clear();
    sortService.shutdown();