Use std::shared_ptr in FastMonitoringThread.h

[Teemperor]

We don't include boost/shared_ptr in this header, so this header
doesn't compile on its own right now. Instead of include the
boost header, let's just move to std::shared_ptr instead as this
is anyway just a private member variable.

[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:

EventFilter/Utilities

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

cms-bot commands are listed here

[davidlange6]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/20713/console Started: 2017/06/19 11:26

[cmsbuild]

+1
Tested at: 4aa3db2
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19330/20713/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-19330/20713/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 22
• DQMHistoTests: Total histograms compared: 1803136
• DQMHistoTests: Total failures: 44265
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 1758705
• 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 #19330 4aa3db2

• technical (good to get rid of boost::shared_ptr)
• jenkins tests pass

[davidlange6]

merge