[SPARK-17569][SPARK-17569][TEST] Make the unit test added for work again

## What changes were proposed in this pull request?

A [PR](https://github.com/apache/spark/commit/a6aade0042d9c065669f46d2dac40ec6ce361e63) was merged concurrently that made the unit test for PR #15122 not test anything anymore. This PR fixes the test.

## How was this patch tested?

Changed line https://github.com/apache/spark/blob/0d634875026ccf1eaf984996e9460d7673561f80/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FileStreamSource.scala#L137
from `false` to `true` and made sure the unit test failed.

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #15203 from brkyvz/fix-test.

sql/core/src/test/scala/org/apache/spark/sql/execution/streaming/FileStreamSourceSuite.scala

@@ -92,7 +92,7 @@ class FileStreamSourceSuite extends SparkFunSuite with SharedSQLContext {
       val dir = new File(temp, "dir") // use non-existent directory to test whether log make the dir
       val metadataLog =
         new FileStreamSourceLog(FileStreamSourceLog.VERSION, spark, dir.getAbsolutePath)
-      assert(metadataLog.add(0, Array(FileEntry(s"$scheme:///file1", 100L))))
+      assert(metadataLog.add(0, Array(FileEntry(s"$scheme:///file1", 100L, 0))))
 
       val newSource = new FileStreamSource(spark, s"$scheme:///", "parquet", StructType(Nil),
         dir.getAbsolutePath, Map.empty)