GT update for MVA and HCAL
Added 50ns GT
Merged GT_update_for_MVA_and_HCAL from repository demattia
Merge branch 'CMSSW_7_0_X' of https://github.com/cms-sw/cmssw into from-CMSSW_7_0_0_pre10
Merge pull request #1835 from demattia/GT_update_for_MVA_and_HCAL

Multithreading fixes -- GT update for MVA and HCal