EFTracking FPGA Integration: Fix compilation warning and error for generic XRT algorithm
This MR fixes compilation warnings and errors in the new Athena release. Specifically, the compiler requires explicit construction when using initializer list
error: converting to 'SG::ReadHandleKey<std::vector<long unsigned int> >' from initializer list would use explicit constructor 'SG::ReadHandleKey<T>::ReadHandleKey(const std::string&, const std::string&)
This package is a standalone WIP and this MR will not affect production and validation workflow.
tagging @llewitt