Fix spring-kafka 2.4-2.9 test: remove hardcoded kafka-clients version

The test scenario hardcoded kafka-clients at 2.3.1, but spring-kafka 2.4+
requires matching kafka-clients versions (2.4+, 2.5+, etc.). Fix by removing
the explicit kafka-clients dependency and letting spring-kafka's transitive
dependency pull the correct version automatically.

Author: wu-sheng

CHANGES.md

@@ -15,7 +15,7 @@ Release Notes.
 * Extend Feign plugin to support OpenFeign 10.x, 11.x, 12.1.
 * Extend Undertow plugin to support Undertow 2.1.x, 2.2.x, 2.3.x.
 * Extend GraphQL plugin to support graphql-java 18 -> 24 (20+ requires JDK 17).
-* Extend Spring Kafka plugin to support Spring Kafka 3.0 -> 3.3.
+* Extend Spring Kafka plugin to support Spring Kafka 2.4 -> 2.9 and 3.0 -> 3.3.
 
 All issues and pull requests are [here](https://github.com/apache/skywalking/milestone/249?closed=1)
 

docs/en/setup/service-agent/java-agent/Supported-list.md

@@ -77,7 +77,7 @@ metrics based on the tracing data.
   * [RocketMQ](https://github.com/apache/rocketmq) 3.x-> 5.x
   * [RocketMQ-gRPC](http://github.com/apache/rocketmq-clients) 5.x
   * [Kafka](http://kafka.apache.org) 0.11.0.0 -> 3.9.1
-  * [Spring-Kafka](https://github.com/spring-projects/spring-kafka) Spring Kafka Consumer 1.3.x -> 2.3.x, 3.0.x -> 3.3.x (2.0.x and 2.1.x not tested and not recommended by [the official document](https://spring.io/projects/spring-kafka))
+  * [Spring-Kafka](https://github.com/spring-projects/spring-kafka) Spring Kafka Consumer 1.3.x -> 3.3.x (2.0.x and 2.1.x not tested and not recommended by [the official document](https://spring.io/projects/spring-kafka))
   * [ActiveMQ](https://github.com/apache/activemq) 5.10.0 -> 5.15.4
   * [RabbitMQ](https://www.rabbitmq.com/) 3.x-> 5.x
   * [Spring-RabbitMQ](https://github.com/spring-projects/spring-amqp) 2.x -> 4.x

test/plugin/scenarios/spring-kafka-2.3.x-scenario/pom.xml

@@ -55,17 +55,8 @@
                 </exclusion>
             </exclusions>
         </dependency>
-        <dependency>
-            <groupId>org.apache.kafka</groupId>
-            <artifactId>kafka-clients</artifactId>
-            <version>${kafka-version}</version>
-            <exclusions>
-                <exclusion>
-                    <artifactId>slf4j-api</artifactId>
-                    <groupId>*</groupId>
-                </exclusion>
-            </exclusions>
-        </dependency>
+        <!-- Let spring-kafka pull the matching kafka-clients version transitively.
+             Each spring-kafka minor version requires a specific kafka-clients version. -->
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>

test/plugin/scenarios/spring-kafka-2.3.x-scenario/support-version.list

@@ -14,7 +14,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Each Spring Kafka minor version requires a matching kafka-clients version.
-# 2.4+ needs kafka-clients 2.4+, but this scenario uses kafka-clients 2.3.1.
-# Extending to 2.4+ requires separate scenarios with version-matched kafka-clients.
 2.3.10.RELEASE
+2.4.13.RELEASE
+2.5.17.RELEASE
+2.6.15
+2.7.18
+2.8.11
+2.9.13