Make FastCaloSim old/new config more similar

Blaz Lebanrequested to merge
bleban/athena:ISF_config_fixes into master

  1. Make FastCaloSim old/new config more similar:

    • FastCaloSimV2Tool RandomStream fix
    • add LumiBlockNumber ConfigFlag

  2. Cleanup and refresh some code

  3. Force methods to return private tools

  4. Fix some bugs

FYI @jchapman

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