New script and macro to extract occupancy plots from DQM files

[venturia]

Backport of #8250

[cmsbuild]

A new Pull Request was created by @venturia for CMSSW_7_4_X.

New script and macro to extract occupancy plots from DQM files

It involves the following packages:

DQM/SiStripMonitorClient

@cmsbuild, @danduggan, @nclopezo, @deguio can you please review it and eventually sign? Thanks.
@threus this is something you requested to watch as well.
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[cmsbuild]

+1
Tested at: 13b65fe
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8298/6651/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8298/6651/summary.html

[deguio]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @ktf, @smuzaffar

[davidlange6]

+1