Merge branch 'hlt-data-scouting' into 'master'

...eer/TrigOutputHandling/python/TrigOutputHandlingConfig.py

...Steer/TrigOutputHandling/src/TriggerEDMSerialiserTool.cxx

...igSteer/TrigOutputHandling/src/TriggerEDMSerialiserTool.h

Trigger/TrigValidation/TrigUpgradeTest/CMakeLists.txt

Trigger/TrigValidation/TrigUpgradeTest/python/pebMenuDefs.py

.../TrigValidation/TrigUpgradeTest/share/dataScoutingTest.py

...TrigValidation/TrigUpgradeTest/share/dataScoutingTest.ref

.../TrigValidation/TrigUpgradeTest/share/egamma.withViews.py

...er/TrigValidation/TrigUpgradeTest/share/egammaRunData.ref

Trigger/TrigValidation/TrigUpgradeTest/share/pebTest.py

.../TrigValidation/TrigUpgradeTest/test/test_dataScouting.sh