Thread safe access to HCAL conditions containers

[Dr15Jones]

Modified how HCAL conditions containers are used in order to be thread safe. The setTopo method of the containers is now non-const. Therefore to fully initialize a container read from the database, the container is copied and the copy gets the setTopo call. This copy is either done via an ESProducer or, for less used containers, by the module which requested the original container.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_7_3_X.

Thread safe access to HCAL conditions containers

It involves the following packages:

CalibCalorimetry/CaloTPG
CalibCalorimetry/HcalAlgos
CalibCalorimetry/HcalPlugins
CaloOnlineTools/HcalOnlineDb
CondFormats/HcalObjects
CondTools/Hcal
DQM/HcalMonitorClient
DQM/HcalMonitorTasks
DQMOffline/Hcal
RecoEgamma/EgammaHLTProducers
RecoLocalCalo/CaloTowersCreator
RecoLocalCalo/HcalRecAlgos
RecoLocalCalo/HcalRecProducers
RecoMET/METFilters
RecoMET/METProducers
RecoMuon/MuonIdentification
RecoParticleFlow/PFClusterProducer
SimCalorimetry/HcalSimAlgos
Validation/HcalRecHits

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[slava77]

+1

for #6060 6d8e44a
tested in CMSSW_7_3_X_2014-10-28-1400 (test area sign449)
no differences in monitored quantities, looking at just at the shorter set of matrix tests

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6060/530/summary.html

[davidlange6]

everything was approved before the rebase, so pushing in - please post any issues we missed to this PR.