Update types of event/run/lumi in Jet/MET (for fastjet)

The online is changing to produce data with event numbers that are 64 bits instead of 32 bits. CMSSW software needs to be modified to handle that. Following
https://hypernews.cern.ch/HyperNews/CMS/get/recoDevelopment/1302.html
I am making changes to different packages, here JET/MET for fastjet usage. Changing the types in fastjet would be a longer process so I just explicitly cast to the supported type (the run/event numbers are used as random seeds - there should be no practical problem here).  Updates are generally trivial and there should be no any visible effects of them (except for the rare event numbers with > 32 bits).