/*
   * Get CIM Namespace for Openwsman
   * Note:
   * Microsoft WinRM set the resource namespace by attaching it
   * to the resource URI
   *
   * See also: Openwsman.epr_prefix_for
   *
   * call-seq:
   *   options.cim_namespace -> String
   *
   */
  const char *get_cim_namespace() {