MiniAOD part 3 (7.0.X version)

7.0.X version of #3946 and #3875, plus an extra bugfix to PUJetId on ak4 jets.

Tested on **CMSSW_7_0_X_2014-05-26-0200** with

    cmsDriver.py miniAOD_data-prod -s PAT -n 100 --data --filein /store/relval/CMSSW_7_0_0/SingleMu/RECO/GR_R_70_V1_RelVal_zMu2012D-v2/00000/0259E46E-F698-E311-8CFD-003048FF9AC6.root  --eventcontent MINIAOD --runUnscheduled --conditions GR_R_70_V1::All --no_exec
    cmsDriver.py miniAOD-prod -s PAT -n 100 --mc --filein /store/relval/CMSSW_7_0_0/RelValTTbar_13/GEN-SIM-RECO/PU50ns_POSTLS170_V4-v2/00000/265B9219-FF98-E311-BF4A-02163E00EA95.root  --eventcontent MINIAODSIM --runUnscheduled --conditions auto:startup --no_exec
    cmsDriver.py miniAOD-fsim-prod -s PAT -n 100 --mc --fast --filein /store/relval/CMSSW_7_0_0/RelValTTbar_13/GEN-SIM-DIGI-RECO/POSTLS170_V3_FastSim-v2/00000/109B6DF8-A798-E311-A88F-02163E00A0F0.root --eventcontent MINIAODSIM --runUnscheduled --conditions POSTLS170_V3::All --no_exec

@arizzi @bendavid