TRT Minor Fixes
Various corrections suggested by Götz Gaycken:
Made CondAlgs non-reentrant for now. More safe.
Removed unneccessary ServiceHandles to DetectorStore in TRT_CalDbTool and TRT_StrawStatusSummaryTool.
Changed a variable name from ..WriteKey to ..ReadKey, since it really is a ReadCondHandleKey.
Replaced the condition EvtMax==1 in InDetRecConditionsAccess.py by the condition that the OutputConditionsAlg be present in topsequence.