message: minor test fixes for buffer manager test
diff: @@ -14,6 +14,7 @@ TEST_CASE("Test scanning a table and computing an aggregate over a table that ex
  // set the maximum memory to 10MB
  config->maximum_memory = 10000000;
  + config->maximum_threads = 1;
  int64_t expected_sum;
  Value sum;
  @@ -52,6 +53,7 @@ TEST_CASE("Test storing a big string that exceeds buffer manager size", "[storag
  unique_ptr<MaterializedQueryResult> result;
  auto storage_database = TestCreatePath("storage_test");
  auto config = GetTestConfig();
  + config->maximum_threads = 1;
  uint64_t string_length = 64;
  uint64_t desired_size = 10000000; // desired size is 10MB
  