Important BUG FIX in parameter assignment of millepede-based tracker alignment

[mschrode]

The bug corrupts the IOV-dependent alignment in releases compiled with
slc6_amd64_gcc472 and later. It is caused by using a dangling reference to
an edm::EventID object to determine the run number. At least with the gcc
versions in SLC6, this results in an incorrect determination of the current
IOV. Details are given in this presentation at the tracker-alignment meeting:

https://indico.cern.ch/event/342234/session/0/contribution/8/0/material/slides/0.pdf

The implementation is the outcome of a discussion of #6515 .

This PR supersedes #6516 .

[cmsbuild]

A new Pull Request was created by @mschrode (Matthias Schroeder) for CMSSW_7_2_X.

Important BUG FIX in parameter assignment of millepede-based tracker alignment

It involves the following packages:

Alignment/CommonAlignmentAlgorithm
Alignment/HIPAlignmentAlgorithm
Alignment/KalmanAlignmentAlgorithm
Alignment/MillePedeAlignmentAlgorithm
Alignment/MuonAlignmentAlgorithms

@diguida, @cerminar, @cmsbuild, @nclopezo, @rcastello, @mmusich can you please review it and eventually sign? Thanks.
@ghellwig, @pakhotin, @frmeier, @battibass, @abbiendi, @tlampen, @mmusich, @trocino this is something you requested to watch as well.
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@nclopezo you are the release manager for this.
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[cmsbuild]

+1
Tested at: d205a00
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6726/1357/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6726/1357/summary.html

[ktf]

@diguida, @mmusich ping. Is this still needed?

[diguida]

@ktf It is a backport of a bug-fix entering most recent release cycles, and IFAIK it has been used in this cycle for some alignment workflows, so I'd like it in. @mmusich to confirm.

[diguida]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_2_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[davidlange6]

+1