export of additional segment attributes

• change the export in a way, that
  • for repetitions the matchRateType is adjusted accordingly
  • all other segment attributes in sdlxliff, Star Transit files and OpenTM2 Xliff are set accordingly. See examples files to evaluate, which attributes are these. For sdlxliff for example conf, origin, origin-system; for Transit for example EDIT_BY, EDIT_FIRST, EDIT_LAST, EDIT_DATE und STATUS
• do that via event-based mechanisms export or in the export/fileparser, so that plug-ins like the matchResources plug-in can optionally hook in.

Current use case:
when using the matchResource plug-in, the content of the segment field matchRateType is changed on using a match as target.
On export the internally used value from matchRateType must be converted to a valid value of the exported data type (sdlxliff etc). This can be done by the above mentioned event hook in.

Please see implementation of T5DEV-40 for example how to solve these issues (in difference to this, the mapped values for the different file types have to come from the matchResource plug-in for good architecture)