Convert HLTTauRefProducer from legacy filter to global filter

[knoepfel]

Very few actual changes required to convert from legacy to global.

• Removed unused functions.
• Adjusted doXYZ(...) functions to be const-qualified and take only a reference to an edm::Event.
• Made local variable doID for doElectrons so as to avoid changing values of class members during a multi-threaded context.
• General C++ improvements: use range-for's, automatic type deduction, replace push_back with emplace_back, etc.

[cmsbuild]

A new Pull Request was created by @knoepfel (Kyle Knoepfel) for CMSSW_9_0_X.

It involves the following packages:

DQMOffline/Trigger

@cmsbuild, @dmitrijus, @vanbesien, @davidlange6 can you please review it and eventually sign? Thanks.
@battibass, @mtosi, @jhgoh, @calderona, @HuguesBrun, @trocino, @rociovilar this is something you requested to watch as well.
@davidlange6, @smuzaffar you are the release manager for this.

cms-bot commands are listed here #13028

[knoepfel]

@Dr15Jones

[dmitrijus]

+1

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/17761/console Started: 2017/02/13 15:05

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_9_0_X IBs after it passes the integration tests. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @smuzaffar

[cmsbuild]

+1
Tested at: 61c6b49
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-17449/17761/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-17449/17761/summary.html

[davidlange6]

+1