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Tuning QEE DiElectron Lines

Constantin Niko Weisser requested to merge weisser_tuningQEE_DiE into 2018-patches

The QEE DiE lines (ExoticaPi0ToDiEGamma{Full, Micro}Line, ExoticaEtaToDiEGamma{Full, Micro}Line and ExoticaDisplDiELowMass{Full, Micro}Line) are new lines introduced for 2018 running.

Assuming allowed rates for Micro and Full lines of 0.5% and 0.05%, the S34 retention tests (https://twiki.cern.ch/twiki/bin/view/LHCb/StrippingStatisticsStripping34#QEE) showed that the rates for the Full lines were a factor of 10 too large. This merge request prescales these lines. We would prefer to keep the Micro lines as they are, but if a further rate reduction is required, we can tune.

For this test the Micro lines ended up in the EW stream, which seems to be a Full stream. Could you please make sure these Micro lines are run as Micro lines?

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