Factor out TES path related code out of GaudiCommon
Factor out TES path related code out of GaudiCommon and into a dedicate FixTESPath mix-in. GaudiCommon uses this mix-in to remain backwards compatible. This will make it possible to migrate away from GaudiAlgorithm and GaudiTool, while keeping the TES path manipulation utilities available.
Edited by Marco Clemencic