Merge branch 'cost_thrchk' into 'master'

...asWeighter/EnhancedBiasWeighter/ATLAS_CHECK_THREAD_SAFETY

...dBiasWeighter/EnhancedBiasWeighter/EnhancedBiasWeighter.h

...EnhancedBiasWeighter/EnhancedBiasWeighter/ReadLumiBlock.h

...igCost/EnhancedBiasWeighter/Root/EnhancedBiasWeighter.cxx

Trigger/TrigCost/EnhancedBiasWeighter/Root/ReadLumiBlock.cxx

Trigger/TrigCost/RatesAnalysis/CMakeLists.txt

...ost/RatesAnalysis/RatesAnalysis/ATLAS_CHECK_THREAD_SAFETY

Trigger/TrigCost/RatesAnalysis/RatesAnalysis/RatesGroup.h

...ger/TrigCost/RatesAnalysis/RatesAnalysis/RatesHistoBase.h

...r/TrigCost/RatesAnalysis/RatesAnalysis/RatesScanTrigger.h

Trigger/TrigCost/RatesAnalysis/RatesAnalysis/RatesTrigger.h

Trigger/TrigCost/RatesAnalysis/src/RatesAnalysisAlg.cxx

Trigger/TrigCost/RatesAnalysis/src/RatesGroup.cxx

Trigger/TrigCost/RatesAnalysis/src/RatesHistoBase.cxx

Trigger/TrigCost/RatesAnalysis/src/RatesScanTrigger.cxx

Trigger/TrigCost/RatesAnalysis/src/RatesTrigger.cxx

Trigger/TrigCost/RatesAnalysis/test/RatesAnalysis_test.cxx

Trigger/TrigCost/TrigCostAnalysis/ATLAS_CHECK_THREAD_SAFETY

Trigger/TrigCost/TrigCostAnalysis/CMakeLists.txt

Trigger/TrigCost/TrigCostAnalysis/src/CounterBase.h