Cherry-pick !5d1b2cdc from master: Add flag to OutputStream to write metadata and close after next Event. ATEAM-832

Add flag to OutputStream to write metadata and close after next Event. ATEAM-832

See merge request !53619 (merged)

(cherry picked from commit b4fc1ea8)

5d1b2cdc Add flag to OutputStream to write metadata and close after next Event

This merge request affects 1 package:

• Control/AthenaServices

This merge request affects 6 files:

• Control/AthenaServices/src/AthenaOutputStream.cxx
• Control/AthenaServices/src/AthenaOutputStream.h
• Control/AthenaServices/src/MetaDataSvc.cxx
• Control/AthenaServices/src/MetaDataSvc.h
• Control/AthenaServices/src/OutputStreamSequencerSvc.cxx
• Control/AthenaServices/src/OutputStreamSequencerSvc.h

Adding @ssnyder as watcher

added 22.0 Core review-pending-level-1 labels

CI Result SUCCESS (hash b9a083db)

	Athena	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 53074]

Approving -- L1

added review-approved label and removed review-pending-level-1 label

added review-approved-tier0 label

added review-approved-point1 label

merged

mentioned in commit c2cca6b8