LArCellConditions: More fixes for master

Walter Lamplrequested to merge
wlampl/athena:LArCellCond_BadChan into master

LArCellConditions script:

  • switch to LArCablingCondAlg (away for LArCablingLegacySvc)
  • resurrect bad-channel printout (based on LArBadChannelCondAlg)
  • remove debug output

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