Also parse invalid xml files

* store invalid xml files also in input_files (extra field validFile)
* add error handling to get xml-steps
* adjust stage_activity_date, get iso-date as string, try to convert it
simplify check organisation ref

* use parameters to get source/target database and fields (org: name,
ref, key)
* store output directly to database

todo: rename files (remove reporting part)
renamed files (it does not only check reporting org ref)