T0 processing fixes: csc untracked to tracked, add dqm_offline customization (same as #10316 )

[slava77]

This is an interim PR fixing T0 setup, eventually the goal is to use the functions in
Configuration/python/postLS1Customs.customisePostLS1

[cmsbuild]

A new Pull Request was created by @slava77 (Slava Krutelyov) for CMSSW_7_6_X.

T0 processing fixes: csc untracked to tracked, add dqm_offline customization (same as #10316 )

It involves the following packages:

Configuration/DataProcessing

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

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

+1
Tested at: e7f8d96
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-10318/6429/summary.html