Add flag to OutputStream to write metadata and close after next Event. ATEAM-832
ATEAM-832
Added internal m_writeMetadataAndDisconnect flag to AthenaOutputStream that
tells it to write out metadata and disconnect from the output after
finishing writing the next Event.
This is used by OutputSequencer in SP mode, when chaning to the next
output file is triggered by EndEvent - used by EventDisplay. EndEvent
comes before output writing, so the disconnect can't happen right away
and needs to be postponed.
Jobs other than EventDisplay should not be affected at all.
Edited by Marcin Nowak