removed lumi producer from HI reco
Update RecoTLR.py

Added back lumiProducer to prompt reco customization upon Slava's request
Update ReconstructionHeavyIons_cff.py

Need to import lumiProducer even though not used by default, as it can be called from the prompt reco customization (same is done for pp)
Merge pull request #6738 from mandrenguyen/removeLumiProdHI

removed lumi producer from HI reco
Merge remote branch 'origin/CMSSW_7_4_X' into CMSSW_7_0_X