[fix][test] Fix schema not found check on unit test

[Demogorgon314]

Motivation

After #12647, the schema not found exception message is replaced by Schema not found, so the AdminApiSchemaValidationEnforced test will always fail.

java.lang.AssertionError: 
Expected :true
Actual   :false
<Click to see difference>


  at org.testng.Assert.fail(Assert.java:99)
  at org.testng.Assert.failNotEquals(Assert.java:1037)
  at org.testng.Assert.assertTrue(Assert.java:45)
  at org.testng.Assert.assertTrue(Assert.java:55)
  at org.apache.pulsar.broker.admin.AdminApiSchemaValidationEnforced.testDisableSchemaValidationEnforcedHasSchema(AdminApiSchemaValidationEnforced.java:105)
// ...

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[Demogorgon314]

/pulsarbot run-failure-checks

[Demogorgon314]

/pulsarbot run-failure-checks

[BewareMyPower]

It's an early PR, I'm wondering why could the CI still pass?

[Demogorgon314]

It's an early PR, I'm wondering why could the CI still pass?

Maybe because the test unit class name did not end with Test? After adding the Test suffix, it is running well in my local env.

[codelipenghui]

@Demogorgon314 Please help check the failed test.

[Demogorgon314]

/pulsarbot run-failure-checks

[Demogorgon314]

/pulsarbot run-failure-checks

[Demogorgon314]

/pulsarbot run-failure-checks

[Demogorgon314]

/pulsarbot run-failure-checks

[Demogorgon314]

/pulsarbot run-failure-checks

[github-actions]

The pr had no activity for 30 days, mark with Stale label.

[Jason918]

@Demogorgon314 Please rebase to the master.

[github-actions]

The pr had no activity for 30 days, mark with Stale label.

[Demogorgon314]

PR #17767 already fixed this issue, so I will close this PR.