message: Fix namespace issue
diff: #include <boost/test/unit_test.hpp>
  +namespace {
  +
  SigmaMintId GenerateSigmaMintId(PropertyId property, SigmaDenomination denom)
  {
  SigmaPrivateKey priv;
  @@ -15,6 +17,8 @@ SigmaMintId GenerateSigmaMintId(PropertyId property, SigmaDenomination denom)
  return SigmaMintId(property, denom, pub);
  }
  +}
  +
  namespace exodus {
  BOOST_FIXTURE_TEST_SUITE(exodus_walletmodels_tests, BasicTestingSetup)
  