clear disp-vtx vector and other changes

[swagata87]

backport of #20480

[cmsbuild]

A new Pull Request was created by @swagata87 (Swagata Mukherjee) for CMSSW_9_2_X.

It involves the following packages:

DataFormats/Scouting
HLTrigger/Muon

@smuzaffar, @cmsbuild, @silviodonato, @Martin-Grunewald, @Dr15Jones, @fwyzard can you please review it and eventually sign? Thanks.
@battibass, @abbiendi, @jhgoh, @Martin-Grunewald, @calderona, @HuguesBrun, @trocino this is something you requested to watch as well.
@davidlange6, @slava77 you are the release manager for this.

cms-bot commands are listed here

• Backported from create and clear vector of vertex index per-muon, not per event. #20480

[Martin-Grunewald]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/22963/console Started: 2017/09/14 09:04

[cmsbuild]

+1
Tested at: 4b1a2af
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20505/22963/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
43abbee
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20505/22963/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20505/22963/git-merge-result

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-20505/22963/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 23
• DQMHistoTests: Total histograms compared: 1904625
• DQMHistoTests: Total failures: 29744
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 1874707
• DQMHistoTests: Total skipped: 174
• DQMHistoTests: Total Missing objects: 0
• Checked 94 log files, 14 edm output root files, 23 DQM output files

[Martin-Grunewald]

+1

[Dr15Jones]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_9_2_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_9_4_X is complete. This pull request will now be reviewed by the release team before it's merged. @davidlange6, @slava77, @smuzaffar (and backports should be raised in the release meeting by the corresponding L2)

[davidlange6]

+1