OPENDJ-2474 Fix NPE when stopping server with not fully started server

Nicolas Capponi

26.11.2015 a6cbbbeeebd98b6e7bd3934da38b8629257687f7

 opendj-server-legacy/src/main/java/org/opends/server/loggers/AccessLogger.java

@@ -521,7 +521,11 @@
  public final synchronized void removeAllLogPublishers()
  {
    loggerStorage.removeAllLogPublishers();
    getServerContext().getCommonAudit().shutdown();
    // Access logger may have not been fully initialized
    if (getServerContext() != null && getServerContext().getCommonAudit() != null)
    {
      getServerContext().getCommonAudit().shutdown();
    }
  }
}