Zdc unpacker digi reco (rebase of #13882)

[slava77]

copy-paste from #13882

Updated PR #13881 with ALL of the files instead of just some of them :-/.

I've updated the zdc unpacker, which was implemented in 75X for the HI run, but not in subsequent releases. Additionally, I've updated digi->reco functionality so that reco level ZDC objects are generated.

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/12388/console

[cmsbuild]

A new Pull Request was created by @slava77 (Slava Krutelyov) for CMSSW_8_1_X.

It involves the following packages:

Configuration/StandardSequences
EventFilter/CastorRawToDigi
RecoLocalCalo/Configuration
RecoLocalCalo/HcalRecProducers

@cmsbuild, @cvuosalo, @franzoni, @slava77, @davidlange6 can you please review it and eventually sign? Thanks.
@ghellwig, @makortel, @GiacomoSguazzoni, @rovere, @VinInn, @Martin-Grunewald, @cerati, @dgulhan this is something you requested to watch as well.
@slava77, @Degano, @smuzaffar you are the release manager for this.

cms-bot commands are list here #13028

[slava77]

@cferraio
this is the replacement PR
in case you didn't receive notification already

[cmsbuild]

+1
Tested at: e4afdf9
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14082/12388/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14082/12388/summary.html

[slava77]

+1

for #14082 e4afdf9

• same code changes as in Zdc unpacker digi reco fix81 x #13882, but after rebase required following merging of small update of specifying event contents modules 81X #13948, which introduced a change in a context line
• jenkins tests pass and comparisons with baseline show the same differences as those observed in Zdc unpacker digi reco fix81 x #13882