Fix an invalid use of a 'static' keyword in DQM/HcalDetDiagPedestalMonitor

[dmitrijus]

Also fix a mistake made in previous commit.
These statics were actually used to store data in between the invocations.
Fixed by making them class members.

Related PR: #12495

[cmsbuild]

A new Pull Request was created by @dmitrijus (Dmitrijus) for CMSSW_8_0_X.

It involves the following packages:

DQM/HcalMonitorTasks

@cmsbuild, @danduggan, @vanbesien, @deguio, @davidlange6 can you please review it and eventually sign? Thanks.
@slava77, @Degano, @smuzaffar you are the release manager for this.

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[deguio]

please test

[deguio]

+1

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/9884/console

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs after it passes the integration tests. This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[cmsbuild]

+1
Tested at: ce2b7d1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-12514/9884/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-12514/9884/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1