Revert "[SPARK-12672][STREAMING][UI] Use the uiRoot function instead of...

Revert "[SPARK-12672][STREAMING][UI] Use the uiRoot function instead of default root path to gain the streaming batch url."

This reverts commit 19e4e9fe. Will merge #10618 instead.

streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala

@@ -26,8 +26,7 @@ import org.apache.spark.Logging
 import org.apache.spark.rdd.PairRDDFunctions
 import org.apache.spark.streaming._
 import org.apache.spark.streaming.ui.UIUtils
-import org.apache.spark.ui.{UIUtils => SparkUIUtils}
-import org.apache.spark.util.{EventLoop, ThreadUtils}
+import org.apache.spark.util.{EventLoop, ThreadUtils, Utils}
 
 
 private[scheduler] sealed trait JobSchedulerEvent
@@ -204,7 +203,7 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
       try {
         val formattedTime = UIUtils.formatBatchTime(
           job.time.milliseconds, ssc.graph.batchDuration.milliseconds, showYYYYMMSS = false)
-        val batchUrl = s"${SparkUIUtils.uiRoot}/streaming/batch/?id=${job.time.milliseconds}"
+        val batchUrl = s"/streaming/batch/?id=${job.time.milliseconds}"
         val batchLinkText = s"[output operation ${job.outputOpId}, batch time ${formattedTime}]"
 
         ssc.sc.setJobDescription(