fix unnecessary ptr copy in HcalObjects

[kpedro88]

@slava77 followup to #15959 (comment), this propagates the fix from df0c1b3 to all other affected classes in CondFormats/HcalObjects. CPU usage in HBHEIsolatedNoiseReflagger is reduced dramatically (igprof output from step3 of WF 10024.0):

CMSSW_8_1_X_2016-10-27-1100:             0.1  .........       0.13 / 0.13         HBHEIsolatedNoiseReflagger::produce(edm::Event&, edm::EventSetup const&) [2893]
                    PR15959:             0.1  .........       0.26 / 0.26         HBHEIsolatedNoiseReflagger::produce(edm::Event&, edm::EventSetup const&) [1932]
                     fixptr:             0.0  .........       0.02 / 0.02         HBHEIsolatedNoiseReflagger::produce(edm::Event&, edm::EventSetup const&) [6527]
             fixptr+PR15959:             0.0  .........       0.04 / 0.04         HBHEIsolatedNoiseReflagger::produce(edm::Event&, edm::EventSetup const&) [5496]

attn: @igv4321

[cmsbuild]

A new Pull Request was created by @kpedro88 (Kevin Pedro) for CMSSW_8_1_X.

It involves the following packages:

CondFormats/HcalObjects

@ghellwig, @cerminar, @cmsbuild, @franzoni, @ggovi, @mmusich, @davidlange6 can you please review it and eventually sign? Thanks.
@ghellwig, @apfeiffer1, @tocheng this is something you requested to watch as well.
@slava77, @smuzaffar you are the release manager for this.

cms-bot commands are listed here #13028

[kpedro88]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/16059/console

[mmusich]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/16060/console

[cmsbuild]

+1
Tested at: 83da4d2
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-16388/16059/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

+1
Tested at: 83da4d2
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-16388/16060/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-16388/16059/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-16388/16060/summary.html

[Dr15Jones]

These changes look thread-safe.

[mmusich]

+1

[ggovi]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_1_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @smuzaffar