CaloTools+FastCaloSim+TrkVKalVrtFitter: update unit tests for changed in ROOT messaging

Frank Winklmeierrequested to merge
fwinkl/athena:rootwarn into master

With gaudi/Gaudi!1412 (merged) messages from ROOT will be forwarded through the MessageSvc and they will look like regular Athena/Gaudi messages. Adapt a few unit tests to the changes in the output format (in a backwards compatible manner).

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