Clean up cosmic mu reco in pp

[trocino]

This is to skip regional-tracker reco and global-muon reco (both 1- and 2-leg) in the cosmic-muon reconstruction sequence used in collisions. (Note that there is no change in cosmic runs.)
The following modules are removed:
Tracking:
regionalCosmicTracksSeq = regionalCosmicTrackerSeedingLayers * regionalCosmicTrackerSeeds * regionalCosmicCkfTrackCandidates * regionalCosmicTracks
Global-muon reco:
globalCosmicMuons, globalCosmicMuons1Leg
The corresponding event content is also removed.
This is based on the configuration prepared by @bellan. The tracking changes were discussed and agreed on with @VinInn and @rovere.

[cmsbuild]

A new Pull Request was created by @trocino (Daniele Trocino) for CMSSW_7_4_X.

Clean up cosmic mu reco in pp

It involves the following packages:

Configuration/StandardSequences
RecoMuon/Configuration
RecoTracker/Configuration

@nclopezo, @cvuosalo, @cmsbuild, @franzoni, @slava77, @davidlange6 can you please review it and eventually sign? Thanks.
@ghellwig, @appeltel, @battibass, @makortel, @abbiendi, @GiacomoSguazzoni, @rovere, @VinInn, @Martin-Grunewald, @bellan, @gpetruc, @cerati, @rociovilar, @dgulhan, @bachtis, @venturia this is something you requested to watch as well.
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[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

+1
Tested at: f376e26
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7541/2332/summary.html

[slava77]

.. I'm checking it

[slava77]

+1

for #7541 f376e26
tested in CMSSW_7_4_X_2015-02-02-0200 /test area sign513, commits cherry-picked)

In general, changes are as expected.

The banchmark sample for run2 TTbar with PU35@25ns shows reduction in used resources:

• CPU reduces by 10% (compared to older tests with an independent input sample of 5%, in both cases driven by ~10 events) ==> about 7% CPU reduction. GOOD.
• AODSIM size decreases by 0.1% (negligible)
• muonsFromCosmics change slightly, the only more visible change is the matching ecal info (the plot is 10 GeV SingleMuon "dimuon" gun); the standalone muons are not pointing as well to the calorimeter cells as the tracker tracks
  
  
• muonsFromCosmics1Leg change significantly in muon gun samples (real dimuons)
  (same 10 GeV muon gun sample). In this case pointing capabilities are worse to the HCAL as well
  
  
  
  

[davidlange6]

+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 will be automatically merged.