Fix errors from using published dataset names
the merged Scenario of TrackerCSA14+LS1BPixRepair was added; the details can be found in presentation from November 20th, Alignment meeting

https://indico.cern.ch/event/342234/session/0/contribution/12/material/slides/1.pdf
New reference for Ideal Alignment and fixes in TrackRefitter and RooFit config
add cross section info to the HepMC record
added shifted beamspot
set the error of cross section for Pythia8
Merge pull request #6795 from civanch/shifted_beam_spot_71

added shifted beamspot
Merge pull request #6816 from bendavid/fillpy8xsecerr_71x

set the error of cross section for Pythia8
Merge pull request #6591 from mkirsano/pythia6_addcrosssectioninfo

add cross section info to the HepMC record produced by pythia6
Merge pull request #6558 from scasasso/PR_ZMuMu_BP71X

fix to run Z->mumu alignment validation
Merge pull request #6472 from hroskes/fix-dataset-error-71X

Backport of #6429: Fix errors from using published datasets
Merge pull request #6549 from eavdeeva/NewScenario_CMSSW_7_1

merged Scenario of TrackerCSA14+LS1BPixRepair was added
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X