- Add the missing call to `updateDFProps` after the fork to
  individualize the child properties (e.g. app name).
- Use the `IoComponentMgr` to mange the I/O for child processes as done in
  athenaMP. This creates a sub-directory for each child into which histogram
  files are being written.
- With the above we can run also in `athenaHLT.py` using the offline
  `THistSvc`.

TODO: It's not nice that we are creating empty directories in case the
online `THistSvc` is used. Can probably add a check on the number of
registered files and if zero, don't bother with the I/O component
manager.

TileRecEx: Adjust for tools moved from CaloD3PDMaker to CaloSysD3PDMaker.

See merge request !20055

LArRecUtils: Fix reference to LArHVDB.

See merge request atlas/athena!20052

AthContainersInterfaces,etc: Change getSelectedAuxIDs to return by value.

See merge request !20045

Configuration cleanup for athenaHLT

See merge request !20040

LArMonTools: Fix LArRawChannelMonTool configuration.

See merge request !20054

TileRecUtils: Update reference files.

See merge request !20053

Uniqueness checking fixes for typeless TC adds

See merge request !20043

AthExHive: Fix gcc9 warnings.

See merge request !20056

TileByteStream: Update reference files.

See merge request !20051

More ID trigger configuration

See merge request !20037

manual sweep into master of 16464 from athenaprivate1

See merge request atlas/athena!20011

SCT alg code cleanup for ATLASRECTS-4575

See merge request !20027

Fix two problems with thread/slot safety in the CutFlowSvc

See merge request atlas/athena!20019

In C++11, implicit declarations of copy and assignment are deprecated if the
class has a user defined destructor or copy or assignment.  gcc9 now warns
about this by default.
Adjust to avoid the warning.

Adjust for tools moved from CaloD3PDMaker to CaloSysD3PDMaker.

The ATLASReadFilterTool tools in LArRawChannelMonTool are still public,
so need to be added to TooSvc.
Needed to fix failures in q220 in master.

Fix failures in master.

LArHVDB from LArConditionsCommon should be imported, not included.
Needed to get q220 running again.

Fix failures in master.

- Move all configuration of athenaHLT services to TriggerUnixStandardSetup.py.
  Remove the use of includes as much as possible (apart from user job options).
- Replace the OfflineTHistSvc.py include with a simple flag
- Add error in case the offline THistSvc is used with more than one child
- Move the configuration of HLTResultMTMaker to its own module

add dynamic variables for monitoring L2StandAloneMuon

See merge request atlas/athena!20025

removing problematic collection from ESD in egammaRun trigger test

See merge request atlas/athena!20026

Remove athena-app

See merge request atlas/athena!20012

Updating copyright and private licences

See merge request atlas/athena!20003

Delete obsolete CMT-related packages

See merge request atlas/athena!20020

- Move the reading of EventInfo weights to the only client
  AthFilterAlgorithm
- add a mutex to the addEvent method called by AthFilterAlgorithm