See merge request gaudi/Gaudi!696

See merge request gaudi/Gaudi!695

Fixes LHCBPS-1792

it avoids spurious test failures on busy Gitlab-CI runners

CMake 3.11 looks for ninja in CMAKE_PREFIX_PATH and the SFT builds of it
requires libstdc++ more recent than the system version.

Gitlab CI authored 6 years ago and Andrea Valassi committed 6 years ago

patch generated by https://gitlab.cern.ch/valassi/Gaudi/-/jobs/1471225

- prefer CommonMessaging when available
- add generic visit to downcast INTupleItem to concrete type and
  invoke the provided callable, and use that to dispatch lambdas
  instead of explicit switch statements with almost identical function
  calls
- use boost::string_ref to avoid copying strings more than strictly
  required
- prefer direct member initialization

See merge request !667

Closes #28

Old definition was using the class keyword, the new one was initially using struct and so any forward declaration created a clang warning.
We are now back to class.

add support for multiple CF parents to topological execution flow tracer, and verbose/error messages cleanup in PRG

* master:
  Add test and fix of version propagation in KeyedContainer move (#27)