Upgraded a bunch of modules in DQM/DataScouting

The mission was to upgrade one module: DQM/DataScouting/interface/ScoutingAnalyzerBase.

As always it turned out to be a bit more than that, since this was just a common base class to:
AlphaTVarAnalyzer
DiJetVarAnalyzer
RazorVarAnalyzer
ScoutingTestAnalyzer

There were no big anomalies in this, except for ScoutingTestAnalyzer, which seems to be a test class and also tries to book histograms in the endRun method, which is not really allowed anymore.
Since this is only a test class, and the historgrams are never filled not referenced later, I removed this.
Up to the maintainers/users of DataScouting to shout if they disagree.