[SPARK-4098][YARN]use appUIAddress instead of appUIHostPort in yarn-client mode

https://issues.apache.org/jira/browse/SPARK-4098

Author: WangTaoTheTonic <barneystinson@aliyun.com>

Closes #2958 from WangTaoTheTonic/useAddress and squashes the following commits:

29236e6 [WangTaoTheTonic] use appUIAddress instead of appUIHostPort in yarn-cluster mode

yarn/common/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala

@@ -48,7 +48,7 @@ private[spark] class YarnClientSchedulerBackend(
     val driverHost = conf.get("spark.driver.host")
     val driverPort = conf.get("spark.driver.port")
     val hostport = driverHost + ":" + driverPort
-    sc.ui.foreach { ui => conf.set("spark.driver.appUIAddress", ui.appUIHostPort) }
+    sc.ui.foreach { ui => conf.set("spark.driver.appUIAddress", ui.appUIAddress) }
 
     val argsArrayBuf = new ArrayBuffer[String]()
     argsArrayBuf += ("--arg", hostport)