replace "METProducer" with "GenMETProducer"
replace "METProducer" with "CaloMETProducer"
replace "METProducer" with "CaloMETProducer"
replace "METProducer" with "PFMETProducer"
replace "METProducer" with "TCMETProducer"
Merge pull request #1940 from TaiSakuma/metdev-70X-140102_01

Reco cleanups -- Prepare to delete METProducer