message: test: speed up and simplify peer_eviction_test
  This speeds up the test significantly, which helps when
  running it repeatedly.
  Suggest reviewing the diff with:
  colorMoved = dimmed-zebra
  colorMovedWs = allow-indentation-change
diff: BOOST_FIXTURE_TEST_SUITE(net_peer_eviction_tests, BasicTestingSetup)
  -namespace {
  -constexpr int NODE_EVICTION_TEST_ROUNDS{10};
  -constexpr int NODE_EVICTION_TEST_UP_TO_N_NODES{200};
  -} // namespace
  -
  std::vector<NodeEvictionCandidate> GetRandomNodeEvictionCandidates(const int n_candidates, FastRandomContext& random_context)
  {
  std::vector<NodeEvictionCandidate> candidates;
  @@ -257,8 +252,7 @@ BOOST_AUTO_TEST_CASE(peer_eviction_test)
  {
  FastRandomContext random_context{true};
  - for (int i = 0; i < NODE_EVICTION_TEST_ROUNDS; ++i) {
  - for (int number_of_nodes = 0; number_of_nodes < NODE_EVICTION_TEST_UP_TO_N_NODES; ++number_of_nodes) {
  + for (int number_of_nodes = 0; number_of_nodes < 200; ++number_of_nodes) {
  // Four nodes with the highest keyed netgroup values should be
  // protected from eviction.
  BOOST_CHECK(!IsEvicted(
  @@ -343,6 +337,5 @@ BOOST_AUTO_TEST_CASE(peer_eviction_test)
  // * "Identify the network group with the most connections and youngest member. [...]"
  }
  }
  -}
  BOOST_AUTO_TEST_SUITE_END()
  