HAVANA (AP) — At least two dissidents made it past a first round of voting and are standing as candidates in municipal elections that will be watched on and off the island Sunday as an unprecedented test of Cuba's single-party system. Both men told The Associated Press that they expect to win the second round and become the first officials elected from outside the Communist Party since the first electoral law was established by Fidel Castro's government in 1976. Chaviano, a government lawyer turned independent journalist, said he was seizing an opportunity provided by both the letter of Cuban law, which offers theoretical protection to independent candidacies, and by the mood of historic change that has followed the Dec.