remove the test output file when running centrally
1.add particle flow isolation memeber function for PAT photon data and 2.change the token argument as reference for the function readIsolationLabels for muon,electron and photon producer and 3.make particle flow isolation turn on as default for muon,electron and photon.
add pileup sequence for only muon, electron and photon
Fix inclusion of pfParticleSelection.
Remove old wood, related to pfIso.
Merge branch 'CMSSW_7_1_X' of https://github.com/cms-sw/cmssw into 71X-photon

Use this branch in CMSSW_7_1_X_2014-02-06-0200 or later.
Merge pull request #2345 from cms-analysis-tools/71X-photon

PatAlgos -- 71 x photon
Merge pull request #2318 from deguio/sameAs2316

Validation -- remove the test output file when running centrally
Merge remote branch 'origin/CMSSW_7_0_X' into CMSSW_7_0_X
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X