Speed up Sentinel related tests

* remove FIXME sleep codes for Sentinel related tests
** add functions for Sentinel tests (JedisSentinelTestUtil)
*** waitForSentinelRecognizeRedisReplication
*** waitForNewPromotedMaster
*** waitForSentinelsRecognizeEachOthers
**** TODO: there're no command for sentinel to list recognized sentinel
**** sleep 5.5 sec (sentinel pings to master every 5 sec)

* set HostAndPort class to public(no longer inner) class
** reason: We cannot know pool's current master if HostAndPort class is
private inner class / HostAndPort classes are duplicated (main/test)
** make getter method and parameterized constructor
*** set fields once, get anytime

src/test/java/redis/clients/jedis/tests/commands/TransactionCommandsTest.java

@@ -32,7 +32,7 @@ public class TransactionCommandsTest extends JedisCommandTestBase {
     public void setUp() throws Exception {
         super.setUp();
 
-        nj = new Jedis(hnp.host, hnp.port, 500);
+        nj = new Jedis(hnp.getHost(), hnp.getPort(), 500);
         nj.connect();
         nj.auth("foobared");
         nj.flushAll();