auto pseudo parabolic for data taking or field from DB for B 0T mostly

[slava77]

This provides a python-based auto-selection of the field to be served in the tracker as parabolicMF.

• proper parabolic for 3.8 T
• uniform 0 for 0 T
• parameterized engine values for intermediate field values

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

A new Pull Request was created by @slava77 (Slava Krutelyov) for CMSSW_7_3_X.

auto pseudo parabolic for data taking or field from DB for B 0T mostly

It involves the following packages:

Configuration/StandardSequences
MagneticField/ParametrizedEngine
MagneticField/UniformEngine

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

@slava77 - i will merge this and we can review in parallel.

[slava77]

Hi David
unfortunately this one is broken :(

[davidlange6]

ok - then I can revert...

[cmsbuild]

-1
Tested at: 7f4ca1a
The relvals timed out after 2 hours.

When I ran the RelVals I found an error in the following worklfows:
4.53 step2

runTheMatrix-results/4.53_RunPhoton2012B+RunPhoton2012B+HLTD+RECODreHLT+HARVESTDreHLT+MINIAODDreHLT/step2_RunPhoton2012B+RunPhoton2012B+HLTD+RECODreHLT+HARVESTDreHLT+MINIAODDreHLT.log
----- Begin Fatal Exception 08-May-2015 19:32:55 CEST-----------------------
An exception of category 'EventSetupConflict' occurred while
   [0] Calling EventProcessor::runToCompletion (which does almost everything after beginJob and before endJob)
Exception Message:
two EventSetup Producers want to deliver type="MagneticField" label="ParabolicMf"
 from record IdealMagneticFieldRecord. The two providers are 
1) type="AutoMagneticFieldESProducer" label="AutoParabolicParametrizedMagneticFieldProducer"
2) type="ParametrizedMagneticFieldProducer" label="ParabolicParametrizedMagneticFieldProducer"
Please either
   remove one of these Producers
   or find a way of configuring one of them so it does not deliver this data
   or use an es_prefer statement in the configuration to choose one.
----- End Fatal Exception -------------------------------------------------

you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-9009/51/summary.html