Backport of clang fixes from CMSSW_7_1_CLANG_X branch

[ktf]

Trivial bugfixes back ported from the CMSSW_7_1_CLANG_X branch. These are the ones which are "just fine" and unambiguous. There are still a few fixes in the above mentioned branch which will need backport but they will be done in a separate pull request since they non-trivially change implementation.

[cmsbuild]

A new Pull Request was created by @ktf (Giulio Eulisse) for CMSSW_7_1_X.

Backport of clang fixes from CMSSW_7_1_CLANG_X branch

It involves the following packages:

CalibCalorimetry/EcalTPGTools
CondFormats/Serialization
DQM/HcalMonitorModule
DQMServices/Components
DataFormats/EcalDigi
DataFormats/PatCandidates
EventFilter/CSCRawToDigi
Geometry/CommonTopologies
JetMETCorrections/Type1MET
L1Trigger/GlobalTriggerAnalyzer
L1TriggerConfig/DTTPGConfigProducers
MuonAnalysis/MomentumScaleCalibration
PhysicsTools/FWLite
PhysicsTools/MVAComputer
PhysicsTools/MVATrainer
PhysicsTools/PatUtils
RecoParticleFlow/PFTracking
RecoPixelVertexing/PixelTriplets
RecoTracker/TkHitPairs
SimG4Core/GFlash
TauAnalysis/MCEmbeddingTools
TrackingTools/GeomPropagators
Validation/EventGenerator
Validation/RecoVertex

@diguida, @ianna, @thspeer, @rcastello, @bendavid, @civanch, @ojeda, @cmsbuild, @ktf, @vciulli, @Dr15Jones, @mdhildreth, @rovere, @deguio, @slava77, @ggovi, @vadler, @Degano, @mulhearn, @apfeiffer1, @nclopezo, @danduggan, @thuer, @monttj, @StoyanStoynev can you please review it and eventually sign? Thanks.
@ghellwig, @TaiSakuma, @GiacomoSguazzoni, @frmeier, @rovere, @argiro, @inugent, @nhanvtran, @gpetruc, @cerati, @mmusich, @lgray, @bachtis, @venturia this is something you requested to watch as well.
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@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[ianna]

+1

[ktf]

@StoyanStoynev Can you please sign this off? I'll make sure I fix the bug after this one has been integrated (to avoid resetting all the signatures).

[StoyanStoynev]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes (tests are also fine). @nclopezo, @ktf can you please take care of it?