Add HLT timeout handling and improve handling of other errors

...ol/TrigExamples/TrigExPartialEB/src/MTCalibPebHypoAlg.cxx

...l/TrigExamples/TrigExPartialEB/src/MTCalibPebHypoTool.cxx

...rol/TrigExamples/TrigExPartialEB/src/MTCalibPebHypoTool.h

...igger/TrigControl/TrigKernel/TrigKernel/HltPscErrorCode.h

HLT/Trigger/TrigControl/TrigServices/src/HltEventLoopMgr.cxx

HLT/Trigger/TrigControl/TrigServices/src/HltEventLoopMgr.h

Trigger/TrigEvent/TrigSteeringEvent/src/HLTResultMT.cxx

.../TrigHLTResultByteStream/src/HLTResultMTByteStreamCnv.cxx

...ger/TrigSteer/TrigOutputHandling/src/HLTResultMTMaker.cxx

...r/TrigSteer/TrigOutputHandling/src/StreamTagMakerTool.cxx

...TrigSteer/TrigOutputHandling/src/TriggerBitsMakerTool.cxx

Trigger/TrigValidation/TrigP1Test/share/testHLT_timeout.py

.../TrigValidation/TrigP1Test/test/test_athenaHLT_timeout.sh