[MINOR] [SQL] Ignores Thrift server UISeleniumSuite

This Selenium test case has been flaky for a while and led to frequent Jenkins build failure. Let's disable it temporarily until we figure out a proper solution.

Author: Cheng Lian <lian@databricks.com>

Closes #6345 from liancheng/ignore-selenium-test and squashes the following commits:

09996fe [Cheng Lian] Ignores Thrift server UISeleniumSuite

sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/UISeleniumSuite.scala

@@ -17,21 +17,18 @@
 
 package org.apache.spark.sql.hive.thriftserver
 
-
-
 import scala.util.Random
 
+import org.apache.hadoop.hive.conf.HiveConf.ConfVars
 import org.openqa.selenium.WebDriver
 import org.openqa.selenium.htmlunit.HtmlUnitDriver
-import org.scalatest.{Matchers, BeforeAndAfterAll}
 import org.scalatest.concurrent.Eventually._
 import org.scalatest.selenium.WebBrowser
 import org.scalatest.time.SpanSugar._
+import org.scalatest.{BeforeAndAfterAll, Matchers}
 
-import org.apache.hadoop.hive.conf.HiveConf.ConfVars
 import org.apache.spark.sql.hive.HiveContext
 
-
 class UISeleniumSuite
   extends HiveThriftJdbcTest
   with WebBrowser with Matchers with BeforeAndAfterAll {
@@ -75,9 +72,9 @@ class UISeleniumSuite
      """.stripMargin.split("\\s+").toSeq
   }
 
-  test("thrift server ui test") {
+  ignore("thrift server ui test") {
     withJdbcStatement(statement =>{
-      val baseURL = s"http://localhost:${uiPort}"
+      val baseURL = s"http://localhost:$uiPort"
 
       val queries = Seq(
         "CREATE TABLE test_map(key INT, value STRING)",
@@ -86,14 +83,14 @@ class UISeleniumSuite
       queries.foreach(statement.execute)
 
       eventually(timeout(10 seconds), interval(50 milliseconds)) {
-        go to (baseURL)
-        find(cssSelector("""ul li a[href*="ThriftServer"]""")) should not be(None)
+        go to baseURL
+        find(cssSelector("""ul li a[href*="ThriftServer"]""")) should not be None
       }
 
       eventually(timeout(10 seconds), interval(50 milliseconds)) {
         go to (baseURL + "/ThriftServer")
-        find(id("sessionstat")) should not be(None)
-        find(id("sqlstat")) should not be(None)
+        find(id("sessionstat")) should not be None
+        find(id("sqlstat")) should not be None
 
         // check whether statements exists
         queries.foreach { line =>