[cleanup][broker] Add missing @Test annotation

[michaeljmarshall]

Motivation

#18416 added a new test and missed the @Test annotation.

Modifications

Add the @Test annotation.

Verifying this change

This PR includes a "new" test.

Documentation

• doc-not-needed

[codecov-commenter]

Codecov Report

Merging #18528 (2dd599e) into master (aeb4503) will increase coverage by 14.31%.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##             master   #18528       +/-   ##
=============================================
+ Coverage     31.39%   45.70%   +14.31%     
- Complexity     6651    10095     +3444     
=============================================
  Files           697      697               
  Lines         68015    68016        +1     
  Branches       7285     7285               
=============================================
+ Hits          21353    31087     +9734     
+ Misses        43667    33371    -10296     
- Partials       2995     3558      +563     

Flag	Coverage Δ
unittests	45.70% <100.00%> (+14.31%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...che/bookkeeper/mledger/impl/ManagedLedgerImpl.java	53.95% <100.00%> (+0.10%)	⬆️
...apache/pulsar/proxy/server/LookupProxyHandler.java	57.75% <0.00%> (-0.44%)	⬇️
...che/bookkeeper/mledger/impl/ManagedCursorImpl.java	37.11% <0.00%> (-0.06%)	⬇️
.../apache/pulsar/broker/namespace/LookupOptions.java	87.50% <0.00%> (ø)
.../org/apache/pulsar/client/impl/ConnectionPool.java	38.46% <0.00%> (+1.02%)	⬆️
.../apache/pulsar/common/naming/NamespaceBundles.java	69.87% <0.00%> (+1.20%)	⬆️
...roker/systopic/TopicPoliciesSystemTopicClient.java	57.14% <0.00%> (+1.29%)	⬆️
...ersistentStickyKeyDispatcherMultipleConsumers.java	39.90% <0.00%> (+1.44%)	⬆️
.../java/org/apache/pulsar/broker/web/WebService.java	74.86% <0.00%> (+2.13%)	⬆️
... and 148 more