TrigAlgorithms: Enable static thread checker
Enable the static thread-safety checker for most of the Trigger/TrigAlgorithms
packages and apply the relevant (trivial) fixes. The following packages still need to be done:
TrigT2CaloTileMon
TrigT2CaloJet
TrigT2CaloEgamma
TrigT2CaloCosmic
TrigHIRec
TrigT2CaloCommon
TrigT2CaloTau