Reorganization of Counters headers (!1006) · Merge requests · Gaudi / Gaudi

renamed GaudiKernel/Counters.h to Gaudi/Accumulators.h, as by the convention that file names should match the namespaces
moved StatEntity from Gaudi/Accumulators.h to GaudiKernel/StatEntity.h
fixed Gaudi/Chrono/Counters.h and Gaudi/Accumulators.h inclusion order issue (using forward declarations)
move counters unit tests to a proper unit test

Edited Nov 22, 2019 by Marco Clemencic

Reorganization of Counters headers