MAPREDUCE-7023. TestHadoopArchiveLogs.testCheckFilesAndSeedApps fails on rerun

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
(cherry picked from commit e99a1e77671fa0e74a652bc2221bbe01d1a579d3)
(cherry picked from commit 278676508f8a56f3582aaabf7b60099864dc7587)

hadoop-tools/hadoop-archive-logs/src/test/java/org/apache/hadoop/tools/TestHadoopArchiveLogs.java

@@ -61,6 +61,8 @@ public class TestHadoopArchiveLogs {
     Path rootLogDir = new Path("target", "logs");
     String suffix = "logs";
     Path logDir = new Path(rootLogDir, new Path(USER, suffix));
+    fs.delete(logDir, true);
+    Assert.assertFalse(fs.exists(logDir));
     fs.mkdirs(logDir);
 
     // no files found