Revert "auto pseudo parabolic for data taking or field from DB for B …

[davidlange6]

Reverts #9009

[cmsbuild]

A new Pull Request was created by @davidlange6 (David Lange) for CMSSW_7_3_X.

Revert "auto pseudo parabolic for data taking or field from DB for B

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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@nclopezo you are the release manager for this.
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[slava77]

since I pushed my fix to the same topic branch, it's now pretty confusing