Provide a default port to RedisURI's Builder instead of 0 #1205

Author: He-Pin

src/main/java/io/lettuce/core/RedisURI.java

@@ -962,7 +962,7 @@ public static class Builder {
         private String host;
         private String socket;
         private String sentinelMasterId;
-        private int port;
+        private int port = DEFAULT_REDIS_PORT;
         private int database;
         private String clientName;
         private String username;