OPENDJ-3187 Remove support for upgrading from versions older than 2.6.0

Matthew Swift

29.08.2016 326568b2dd4a079b023b977b9f96c321f5f2669d

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

@@ -78,16 +78,13 @@
  /** The {@code config/schema} folder of the current instance. */
  static final File configSchemaDirectory = new File(configDirectory, SCHEMA_PATH_RELATIVE);
  /** The {@code config/upgrade} folder of the current instance. */
  static final File configUpgradeDirectory = new File(configDirectory, "upgrade");
  private static final File configUpgradeDirectory = new File(configDirectory, "upgrade");
  /** The {@code template} folder of the current installation. */
  private static final File templateDirectory = new File(getInstallationPath(), TEMPLATE_RELATIVE_PATH);
  /** The {@code template/config} folder of the current installation. */
  static final File templateConfigDirectory = new File(templateDirectory, CONFIG_PATH_RELATIVE);
  /** The {@code template/config/schema} folder of the current installation. */
  static final File templateConfigSchemaDirectory = new File(templateConfigDirectory, SCHEMA_PATH_RELATIVE);
  /** The {@code config/snmp/security} folder of the current instance. */
  static final File configSnmpSecurityDirectory = new File(
      configDirectory + File.separator + SNMP_PATH_RELATIVE + File.separator + SECURITY_PATH_RELATIVE);
  /** The {@code lib} folder of the current installation. */
  static final File libDirectory = new File(getInstallationPath(), LIB_RELATIVE_PATH);
  /** The {@code bin} folder of the current installation. */