Update to input collection tokens in PATJetProducer

[ferencek]

This PR updates the way jet flavor input tokens are assigned in the PATJetProducer in response to the problem reported in https://hypernews.cern.ch/HyperNews/CMS/get/edmFramework/3726.html

No changes are expected in any of the produced output files. The expected change is that in PAT and MiniAOD workflows legacy flavor modules should no longer be executed.

[cmsbuild]

A new Pull Request was created by @ferencek (Dinko Ferencek) for CMSSW_9_0_X.

It involves the following packages:

PhysicsTools/PatAlgos

@cmsbuild, @cvuosalo, @slava77, @monttj, @davidlange6 can you please review it and eventually sign? Thanks.
@TaiSakuma, @gouskos, @imarches, @ahinzmann, @acaudron, @mmarionncern, @rappoccio, @jdolen, @nhanvtran, @gpetruc, @gkasieczka, @schoef, @ferencek, @mverzett, @mariadalfonso, @pvmulder, @JyothsnaKomaragiri 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

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/18016/console Started: 2017/02/28 17:58

[cmsbuild]

+1
Tested at: bf13531
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-17651/18016/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-17651/18016/summary.html

[perrotta]

+1
Explicitly verified [1] (in 91X) that the fix actually prevents running unnecessarily the un-wanted pat modules.
Besides that, no differences are expected in the jenkins tests, and no differences were observed.

[1] $CMSSW_RELEASE_BASE/src/PhysicsTools/PatAlgos/test/patTuple_standard_cfg.py, as from the hn thread cited in the description of this PR