bugfix cr8ee->cr8lptee

Details:
This is again a typo due to the multiple definitions of the enums.
Started to fix this on a parallel branch.
SusyPlotter::fillHistos : drop default arguments

Details:
the default args were the cause of one bug in the fake control regions
(filling nominal histo multiple times). Drop the default args and add
a clarifying note in SusyPlotter::setSysts. Fix this enum mess asap,
it's becoming un-manageable.
MatrixPrediction::Process fill correctly the histos for the new cr
merge: bugfix _tag target

Details:
we should not assume that the tag includes any leading/trailing
underscore.  When forming the target filename, add the '_' before the
tag.