Add report parameters to report header for excel export of report.
IMHO this this should be configurable (maybe a sysconfig or a report instance option) because it changes a default behaviour, may break some use cases and so must have a way to control in a easy way without code changes.
for example: i have a report cube scheduled to be exported by email or into a dropbox folder.
on another side, i have another software that reads the generated file (spreadsheet) do some task (import data, bi reporting, etc)
with the new parameters lines this integration may be broken or more complex to do
if you agree, i can create a patch for that
Patch is always welcome.
Anyway, for import data and bi reporting, if possible, csv should be use instead of excel export. Far easier to work with pure csv data and for big report, csv file is a lot smaller.