Fixed gcc 7 warnings in FWCore

[Dr15Jones]

Fixed compiler warnings about missing virtual functions.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for master.

It involves the following packages:

FWCore/Framework

@cmsbuild, @smuzaffar, @Dr15Jones, @davidlange6 can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @wddgit this is something you requested to watch as well.
@Muzaffar, @davidlange6, @smuzaffar you are the release manager for this.

cms-bot commands are listed here #13028

[Dr15Jones]

please test

[Dr15Jones]

+1

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/19117/console Started: 2017/04/11 23:02

[cmsbuild]

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

[cmsbuild]

+1
Tested at: c9d2b39
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-18319/19117/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
8c4e21e
e820ed5
bcaea6a
ead81cc
78452f7
d9d9a2c
b3a37ba
87e4b5d
fc0c1e2
e485334
cc77704
85cae23
1a07832
ef123da
a52dbb5
38bfa74
7dbb125
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-18319/19117/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-18319/19117/git-merge-result

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-18319/19117/summary.html

Comparison Summary:

• You potentially added 78 lines to the logs
• Reco comparison results: 5019 differences found in the comparisons
• DQMHistoTests: Total files compared: 23
• DQMHistoTests: Total histograms compared: 1921107
• DQMHistoTests: Total failures: 33361
• DQMHistoTests: Total nulls: 240
• DQMHistoTests: Total successes: 1887333
• DQMHistoTests: Total skipped: 173
• DQMHistoTests: Total Missing objects: 0
• Checked 94 log files, 14 edm output root files, 23 DQM output files

[davidlange6]

+1