Set hierarchy constraints as default in Millepede

[cmsbuild]

This sets back the default way constraints are treated in Millepede to using hierarchy constraints, and reverts the temporary changes introduced with #6254. Previous problems were found to be due to numerical effects in pede. These are solved in >=rev137, which uses 'elimination' instead of lagrangian multipliers.
Automatically ported from CMSSW_7_5_X #9713 (original by @mschrode).

[cmsbuild]

A new Pull Request was created by @cmsbuild for CMSSW_7_6_X.

Set hierarchy constraints as default in Millepede

It involves the following packages:

Alignment/CommonAlignmentAlgorithm

@cmsbuild, @mmusich, @diguida, @cerminar can you please review it and eventually sign? Thanks.
@ghellwig, @pakhotin, @frmeier, @tlampen, @mschrode, @mmusich 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.
If you are a L2 or a release manager you can ask for tests by saying 'please test' in the first line of a comment.
@Degano you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[mmusich]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

+1
Tested at: 7b0496f
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9750/6089/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
b249178
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9750/6089/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9750/6089/git-merge-result

[diguida]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/10322/console

[diguida]

76X is ok, as there we have the new Pede version.

[cmsbuild]

+1
Tested at: 7b0496f
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9750/10322/summary.html

[mmusich]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_6_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9750/10322/summary.html

[davidlange6]

+1