Thread safe changes for FastSimulation/TrackingRecHitProducer

[vkuznet]

This is identical set of changes submitted to prior ticket #1369 which had merging problems.

[cmsbuild]

A new Pull Request was created by @vkuznet (Valentin Kuznetsov) for CMSSW_7_0_X.

Thread safe changes for FastSimulation/TrackingRecHitProducer

It involves the following packages:

FastSimulation/TrackingRecHitProducer
RecoLocalTracker/ClusterParameterEstimator

@nclopezo, @lveldere, @cmsbuild, @thspeer, @giamman, @slava77 can you please review it and eventually sign? Thanks.
@gpetruc, @cerati, @GiacomoSguazzoni, @rovere this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
@ktf you are the release manager for this.

[giamman]

+1

[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/1465/summary.html

[thspeer]

+1
Tested 3154a6d in CMSSW_7_0_X_2013-11-25-0200-1585
No difference in reco as expected, based on RelMon and reco script

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IBs unless changes or unless it breaks tests. @ktf can you please take care of it?