Fix DoraLoadCommandIntegrationTest

### What changes are proposed in this pull request?

Fix DoraLoadCommandIntegrationTest.

### Why are the changes needed?

Without this PR, DoraLoadCommandIntegrationTest may fail with the following exception

```
[ERROR] alluxio.client.cli.fs.command.DoraLoadCommandIntegrationTest.testCommand  Time elapsed: 7.995 s  <<< FAILURE!
java.lang.AssertionError
        at org.junit.Assert.fail(Assert.java:87)
        at org.junit.Assert.assertTrue(Assert.java:42)
        at org.junit.Assert.assertTrue(Assert.java:53)
        at alluxio.client.cli.fs.command.DoraLoadCommandIntegrationTest.testCommand(DoraLoadCommandIntegrationTest.java:107)
```

The cause is that
- The second job is using the same path as the first job
- While submitting the second job, the second job is still in "cleaning" state. As the following log shows

    ```
    2024-01-31 09:52:33,057 [master-rpc-executor-TPE-thread-494] WARN  scheduler.Scheduler (Scheduler.java:submitJob) - There's concurrent submit while job is still in cleaning state
    ```

- "progress" returns the progress of the first job instead of the second one

The PR changes to use a different path for the second job, which avoids this issue.

### Does this PR introduce any user facing changes?

NO

			pr-link: #18504
			change-id: cid-331ba5508e86e8161006073d452ab1ba6230473a

dora/tests/integration/src/test/java/alluxio/client/cli/fs/command/DoraLoadCommandIntegrationTest.java

@@ -84,24 +84,26 @@ public void testCommand() throws Exception {
     assertTrue(mOutput.toString().contains("\"mVerbose\":true"));
 
     // Test load with regx pattern file filter
-    createByteFileInUfs("/testRoot/testFileD", Constants.MB);
-    createByteFileInUfs("/testRoot/testDirectory/testFileE", Constants.MB);
-    createByteFileInUfs("/testRoot/testDirectory/testFileF", Constants.MB);
-    createByteFileInUfs("/testRoot/testDirectory/testFileG1", Constants.MB);
-    createByteFileInUfs("/testRoot/testDirectory/testFileG2", Constants.MB);
-
-    AlluxioURI uriD = new AlluxioURI("/testRoot/testFileD");
-    AlluxioURI uriE = new AlluxioURI("/testRoot/testDirectory/testFileE");
-    AlluxioURI uriF = new AlluxioURI("/testRoot/testDirectory/testFileF");
-    AlluxioURI uriG1 = new AlluxioURI("/testRoot/testDirectory/testFileG1");
-    AlluxioURI uriG2 = new AlluxioURI("/testRoot/testDirectory/testFileG2");
+    mTestFolder.newFolder("testRoot/testDirectory2");
+    createByteFileInUfs("/testRoot/testDirectory2/testFileD", Constants.MB);
+    createByteFileInUfs("/testRoot/testDirectory2/testFileE", Constants.MB);
+    createByteFileInUfs("/testRoot/testDirectory2/testFileF", Constants.MB);
+    createByteFileInUfs("/testRoot/testDirectory2/testFileG1", Constants.MB);
+    createByteFileInUfs("/testRoot/testDirectory2/testFileG2", Constants.MB);
+
+    AlluxioURI uriD = new AlluxioURI("/testRoot/testDirectory2/testFileD");
+    AlluxioURI uriE = new AlluxioURI("/testRoot/testDirectory2/testFileE");
+    AlluxioURI uriF = new AlluxioURI("/testRoot/testDirectory2/testFileF");
+    AlluxioURI uriG1 = new AlluxioURI("/testRoot/testDirectory2/testFileG1");
+    AlluxioURI uriG2 = new AlluxioURI("/testRoot/testDirectory2/testFileG2");
 
     mOutput.reset();
-    assertEquals(0, mFsShell.run("load", path, "--submit",
+    String path2 = path + "/testDirectory2";
+    assertEquals(0, mFsShell.run("load", path2, "--submit",
         "--file-filter-regx", ".*G[1|2]"));
-    assertEquals(0, mFsShell.run("load", path, "--progress"));
+    assertEquals(0, mFsShell.run("load", path2, "--progress"));
     while (!mOutput.toString().contains("SUCCEEDED")) {
-      assertEquals(0, mFsShell.run("load", path, "--progress"));
+      assertEquals(0, mFsShell.run("load", path2, "--progress"));
       Thread.sleep(1000);
     }
     assertTrue(mOutput.toString().contains("Inodes Processed: 2"));