Fix DoraLoadCommandIntegrationTest

[secfree]

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

[jja725]

Thanks for the fix!

[jja725]

alluxio-bot, merge this please