[SPARK-3193]output errer info when Process exit code is not zero in test suite

https://issues.apache.org/jira/browse/SPARK-3193
I noticed that sometimes pr tests failed due to the Process exitcode != 0,refer to
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/18688/consoleFull
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/19118/consoleFull

[info] SparkSubmitSuite:
[info] - prints usage on empty input
[info] - prints usage with only --help
[info] - prints error with unrecognized options
[info] - handle binary specified but not class
[info] - handles arguments with --key=val
[info] - handles arguments to user program
[info] - handles arguments to user program with name collision
[info] - handles YARN cluster mode
[info] - handles YARN client mode
[info] - handles standalone cluster mode
[info] - handles standalone client mode
[info] - handles mesos client mode
[info] - handles confs with flag equivalents
[info] - launch simple application with spark-submit *** FAILED ***
[info]   org.apache.spark.SparkException: Process List(./bin/spark-submit, --class, org.apache.spark.deploy.SimpleApplicationTest, --name, testApp, --master, local, file:/tmp/1408854098404-0/testJar-1408854098404.jar) exited with code 1
[info]   at org.apache.spark.util.Utils$.executeAndGetOutput(Utils.scala:872)
[info]   at org.apache.spark.deploy.SparkSubmitSuite.runSparkSubmit(SparkSubmitSuite.scala:311)
[info]   at org.apache.spark.deploy.SparkSubmitSuite$$anonfun$14.apply$mcV$sp(SparkSubmitSuite.scala:291)
[info]   at org.apache.spark.deploy.SparkSubmitSuite$$anonfun$14.apply(SparkSubmitSuite.scala:284)
[info]   at org.apacSpark assembly has been built with Hive, including Datanucleus jars on classpath

this PR output the process error info when failed, it can be helpful for diagnosis.

Author: scwf <wangfei1@huawei.com>

Closes #2108 from scwf/output-test-error-info and squashes the following commits:

0c48082 [scwf] minor fix according to comments
563fde1 [scwf] output errer info when Process exitcode not zero

core/src/main/scala/org/apache/spark/util/Utils.scala

@@ -20,9 +20,11 @@ package org.apache.spark.util
 import java.io._
 import java.net._
 import java.nio.ByteBuffer
-import java.util.{Locale, Random, UUID}
+import java.util.{Properties, Locale, Random, UUID}
 import java.util.concurrent.{ThreadFactory, ConcurrentHashMap, Executors, ThreadPoolExecutor}
 
+import org.apache.log4j.PropertyConfigurator
+
 import scala.collection.JavaConversions._
 import scala.collection.Map
 import scala.collection.mutable.ArrayBuffer
@@ -834,6 +836,7 @@ private[spark] object Utils extends Logging {
     val exitCode = process.waitFor()
     stdoutThread.join()   // Wait for it to finish reading output
     if (exitCode != 0) {
+      logError(s"Process $command exited with code $exitCode: ${output}")
       throw new SparkException("Process " + command + " exited with code " + exitCode)
     }
     output.toString
@@ -1444,6 +1447,20 @@ private[spark] object Utils extends Logging {
     }
   }
 
+  /**
+   * config a log4j properties used for testsuite
+   */
+  def configTestLog4j(level: String): Unit = {
+    val pro = new Properties()
+    pro.put("log4j.rootLogger", s"$level, console")
+    pro.put("log4j.appender.console", "org.apache.log4j.ConsoleAppender")
+    pro.put("log4j.appender.console.target", "System.err")
+    pro.put("log4j.appender.console.layout", "org.apache.log4j.PatternLayout")
+    pro.put("log4j.appender.console.layout.ConversionPattern",
+      "%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n")
+    PropertyConfigurator.configure(pro)
+  }
+
 }
 
 /**

core/src/test/scala/org/apache/spark/DriverSuite.scala

@@ -19,9 +19,6 @@ package org.apache.spark
 
 import java.io.File
 
-import org.apache.log4j.Logger
-import org.apache.log4j.Level
-
 import org.scalatest.FunSuite
 import org.scalatest.concurrent.Timeouts
 import org.scalatest.prop.TableDrivenPropertyChecks._
@@ -54,7 +51,7 @@ class DriverSuite extends FunSuite with Timeouts {
  */
 object DriverWithoutCleanup {
   def main(args: Array[String]) {
-    Logger.getRootLogger().setLevel(Level.WARN)
+    Utils.configTestLog4j("INFO")
     val sc = new SparkContext(args(0), "DriverWithoutCleanup")
     sc.parallelize(1 to 100, 4).count()
   }

core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala

@@ -317,6 +317,7 @@ class SparkSubmitSuite extends FunSuite with Matchers {
 
 object JarCreationTest {
   def main(args: Array[String]) {
+    Utils.configTestLog4j("INFO")
     val conf = new SparkConf()
     val sc = new SparkContext(conf)
     val result = sc.makeRDD(1 to 100, 10).mapPartitions { x =>
@@ -338,6 +339,7 @@ object JarCreationTest {
 
 object SimpleApplicationTest {
   def main(args: Array[String]) {
+    Utils.configTestLog4j("INFO")
     val conf = new SparkConf()
     val sc = new SparkContext(conf)
     val configs = Seq("spark.master", "spark.app.name")