[SPARK-26873][SQL] Use a consistent timestamp to build Hadoop Job IDs.

## What changes were proposed in this pull request?

Backport SPARK-26873 (#23777) to branch-2.3.

## How was this patch tested?

Existing tests to cover regressions.

Closes #23832 from rdblue/SPARK-26873-branch-2.3.

Authored-by: Ryan Blue <blue@apache.org>
Signed-off-by: Marcelo Vanzin <vanzin@cloudera.com>

sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileFormatWriter.scala

@@ -190,12 +190,14 @@ object FileFormatWriter extends Logging {
           global = false,
           child = plan).execute()
       }
+      val jobIdInstant = new Date().getTime
       val ret = new Array[WriteTaskResult](rdd.partitions.length)
       sparkSession.sparkContext.runJob(
         rdd,
         (taskContext: TaskContext, iter: Iterator[InternalRow]) => {
           executeTask(
             description = description,
+            jobIdInstant = jobIdInstant,
             sparkStageId = taskContext.stageId(),
             sparkPartitionId = taskContext.partitionId(),
             sparkAttemptNumber = taskContext.taskAttemptId().toInt & Integer.MAX_VALUE,
@@ -228,13 +230,14 @@ object FileFormatWriter extends Logging {
   /** Writes data out in a single Spark task. */
   private def executeTask(
       description: WriteJobDescription,
+      jobIdInstant: Long,
       sparkStageId: Int,
       sparkPartitionId: Int,
       sparkAttemptNumber: Int,
       committer: FileCommitProtocol,
       iterator: Iterator[InternalRow]): WriteTaskResult = {
 
-    val jobId = SparkHadoopWriterUtils.createJobID(new Date, sparkStageId)
+    val jobId = SparkHadoopWriterUtils.createJobID(new Date(jobIdInstant), sparkStageId)
     val taskId = new TaskID(jobId, TaskType.MAP, sparkPartitionId)
     val taskAttemptId = new TaskAttemptID(taskId, sparkAttemptNumber)