Migration of JetMET HLT DQM and validation code to DQMEDAnalyzer and DQMEDHarvester

Migrated JetMET HLT validation packages to the DQMEDAnalyzer/DQMEDHarvester interface.

Also updated the configs to monitor SingleJet paths from:
https://its.cern.ch/jira/browse/CMSHLT-123