Merged refs/pull/2491/head from repository cms-sw
fix ExceptionToActionTable lifetime
Properly update empty process history ID
Fix ResidualDecay port from 62X
Update TTbar_GenLepAnalyzer.cc
Merge pull request #2568 from mkirsano/fix_residualdecay70

 GeneratorInterface/Pythia8Interface -- Fix ResidualDecay port from 62X
Merge pull request #2542 from wmtan/FixExceptionToActionTableLifetime

Fix exception to action table lifetime
Merge pull request #2519 from wmtan/DoNotMapEmptyProcessHistoryID70X

 FWCore/Sources -- Don't try to update empty process history ID
Merge pull request #2604 from inugent/TopVallabelPatch_7_0_X

Validation/EventGenerator -- Update TTbar_GenLepAnalyzer.cc
Overriding the cache to avoid high failure rates seen in production when reading pileup datasets via xrootd.
Merge pull request #2649 from ktf/Xrootd-failure-caching-bockelfix

Overriding the cache to avoid high failure rates seen in production when...