Add include for Event.h to StoreManagerTrait.h

[Teemperor]

We use Event in this file, so we also need to include its related
header to make this header compile on its own.

[Teemperor]

Part of the work going on regarding the C++ modules migration of CMSSW (tracked as issue #15248). This PR is not meant to refactor things, but just to make these headers compile.

[cmsbuild]

A new Pull Request was created by @Teemperor (Raphael Isemann) for master.

It involves the following packages:

CommonTools/UtilAlgos

@perrotta, @cmsbuild, @slava77, @monttj, @davidlange6 can you please review it and eventually sign? Thanks.
@makortel this is something you requested to watch as well.
@davidlange6 you are the release manager for this.

cms-bot commands are listed here

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/20648/console Started: 2017/06/16 16:54

[cmsbuild]

+1
Tested at: 716147a
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19288/20648/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
ede1923
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19288/20648/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19288/20648/git-merge-result

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19288/20648/summary.html

Comparison Summary:

• You potentially added 2 lines to the logs
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 22
• DQMHistoTests: Total histograms compared: 1803170
• DQMHistoTests: Total failures: 29554
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 1773450
• DQMHistoTests: Total skipped: 166
• DQMHistoTests: Total Missing objects: 0
• Checked 90 log files, 14 edm output root files, 22 DQM output files

[slava77]

+1

for #19288 716147a

• technical
• jenkins tests pass

[davidlange6]

merge