TauIDVarCalculator: Use ReadHandle(Key) to get EventInfo obj
One more missing DataHandle: TauIDVarCalculator used a retrieve statement to get the EventInfo object. This is the minimal fix to this issue.
Aside: This tool (and others in TauRecTools) have state, so can't be const. The parent algo (TauRecRunner) calls first initializeEvent
that sets a few per-event quantities as class member variables of the tool before calling execute
on each TauJet.