OPENDJ-2773 Fix upgrade

Gaetan Boismal

24.43.2016 356fb0aa8e4afbc8615a29b48082340905781268

 opendj-server-legacy/src/main/java/org/opends/server/tools/upgrade/UpgradeUtils.java

@@ -53,6 +53,7 @@
import org.forgerock.opendj.ldif.LDIF;
import org.forgerock.opendj.ldif.LDIFEntryReader;
import org.forgerock.opendj.ldif.LDIFEntryWriter;
import org.forgerock.util.Reject;
import org.opends.server.core.DirectoryServer;
import org.opends.server.util.ChangeOperationType;
import org.opends.server.util.SchemaUtils;
@@ -744,6 +745,15 @@
    }
  }

  static void deleteFileIfExists(final File f)
  {
    Reject.ifNull(f);
    if (f.exists())
    {
      f.delete();
    }
  }

  /** Prevent instantiation. */
  private UpgradeUtils()
  {