public Properties getDistributedSystemProperties() {
    Properties properties = new Properties();
    properties.setProperty(ENABLE_CLUSTER_CONFIGURATION, "false");
    properties.setProperty(USE_CLUSTER_CONFIGURATION, "false");
    @SuppressWarnings("deprecation")
    final int currentVMNum = VM.getCurrentVMNum();
    properties.setProperty(NAME, "vm" + currentVMNum);
    return properties;
  }
The TcpClient class changed in version FIRST_NEW_VERSION. That version (and later)
no longer has the old constructor TcpClient(final Properties), so we have to access
that constructor via reflection.
geode-tcp-server/src/upgradeTest/java/org/apache/geode/distributed/internal/tcpserver/TcpServerProductVersionUpgradeTest.java