Bug 1427713

_preupgrade-assistant_ rebased to version 2.3.3 The _preupgrade-assistant_ packages have been upgraded to version 2.3.3, which provides a number of bug fixes, enhancements, and other changes over the previous version. Notably: * A new *preupg-diff* tool has been added, which compares multiple Preupgrade Assistant XML reports: one new with unidentified problems and other reports with already analyzed problems. The tool helps to find issues that emerged in the new report by filtering out results that are the same in the new report and in at least one of the analyzed XML files. The output of the trimmed report is available in the XML and HTML format. * Two new return codes have been added: `29` for `internal error`, and `30` for `user abort`. * The meaning of the return code `22` has been changed to `invalid CLI option`. * The STDOUT and STDERR output in the assessment report of the Preupgrade Assistant have been separated into two fields: `Additional output` for STDOUT and `Logs` for STDERR. * The *python* module to be imported by the Preupgrade Assistant modules written in Python has been renamed from `preup` to `preupg`. Additionally, the `preup_ui_manage` executable has been renamed to `preupg-ui-manage`. * The `exit_unknown` function and the `$RESULT_UNKNOWN` variable have been removed. Instead of the `unknown` result, set the error result by using the `exit_error` function. * The `set_component` module API function has been removed. * The `component` input parameter has been removed from the following module API functions: `log_error`, `log_warning`, `log_info`, and `log_debug`.