Update global comms tests for new sampling API. (#338)

* Avoid format securiy warning/error in `mpi_listener.hpp`
* Update recipe classes in `test_communicator.cpp` and `test_domain_decomposition.cpp`.
* Align test names in `test_domain_decomposition.cpp` with those in unit tests.
* Fix `spike_gids` bug in `test_all2all` routine.
* Replace test assertions with `AssertionResult` returns in `test_ring` and `test_all2all`.
* Simplify no-extra-events check in `test_ring` and `test_all2all`.