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Try fixing dddb tags for ftv4 digi and mdf files

Christoph Hasse requested to merge chasse_fix_dddbtags into master

I had noticed a bias in the momentum estimation of long tracks when using these samples.

Thanks to @sesen I was able to fix that bias by switching to a different tag. Note that while there is no more bias, I don't actually know if these tags are correct, and since they are privately produced it is hard to determine.
I tried GaudiPython and a look at the /Event/MC/Header shows:

{ applicationName :	Gauss
applicationVersion :	v51r0
runNumber :	6719250
condDBTags :	[(DDDB, dddb-20171010), (SIMCOND, `)]
platformInfo :	x86_64-slc6-gcc7-opt:SSE4.1
 }{ evtNumber :	68698
evtTime :	0
 }

Although as far as I understand these files are FT decoding version 4 which wasn't present in sim-20170301-vc-md100, therefore I doubt the above info can be trusted.

I'm actually thinking maybe the best would to just remove these files and not use them if we can't be really sure.

fyi: @cattanem since this would most likely also change test output

Edited by Marco Cattaneo

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