Fix bug in caching of surface deformations.

[ghellwig]

This bug has an effect if the DetUnits of a large tracker structure
that are not listed at all. The net effect of this fix is that omitting
them leaves them and the associated surface deformations unchanged.

This serious bug is discussed in https://indico.cern.ch/event/442138/session/0/contribution/21/attachments/1182456/1712522/talk.pdf

[cmsbuild]

A new Pull Request was created by @ghellwig (Gregor Mittag) for CMSSW_8_0_X.

Fix bug in caching of surface deformations.

It involves the following packages:

Alignment/CommonAlignment

@cmsbuild, @mmusich, @diguida, @franzoni, @cerminar can you please review it and eventually sign? Thanks.
@mschrode, @pakhotin, @mmusich, @tlampen this is something you requested to watch as well.
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[mmusich]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/9487/console

[cmsbuild]

+1
Tested at: f07b61b
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-12280/9487/summary.html

[mmusich]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-12280/9487/summary.html