[KYUUBI #2072] Improve rest server behavior

### _Why are the changes needed?_

1. use host address rather than host name, since we also use host address in thrift server
2. remove alert in web ui, it's noisy..

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [x] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #2073 from ulysses-you/web-ui.

Closes #2072

91b6f5b3 [ulysses-you] rest

Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: Kent Yao <yao@apache.org>

kyuubi-server/src/main/resources/org/apache/kyuubi/ui/static/kyuubi.js

@@ -43,5 +43,4 @@ $(function(){
 		});
 	}
 	$('.item.server.version.right.padded').val(kyuubiVersion)
-	alert(kyuubiVersion);
 });

kyuubi-server/src/main/scala/org/apache/kyuubi/server/KyuubiRestFrontendService.scala

@@ -39,7 +39,7 @@ class KyuubiRestFrontendService(override val serverable: Serverable)
 
   override def initialize(conf: KyuubiConf): Unit = synchronized {
     val host = conf.get(FRONTEND_REST_BIND_HOST)
-      .getOrElse(Utils.findLocalInetAddress.getHostName)
+      .getOrElse(Utils.findLocalInetAddress.getHostAddress)
     server = JettyServer(getName, host, conf.get(FRONTEND_REST_BIND_PORT))
     super.initialize(conf)
   }