Set forkCount=1 in CI profile for single-threaded test execution

Add forkCount=1 to both surefire and failsafe plugins in the CI profile
to ensure tests run in single-threaded mode while maintaining toolchain
compatibility by not setting reuseForks=false.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Marvin Froeder <velo.br@gmail.com>

Author: velo

pom.xml

@@ -1067,13 +1067,15 @@
             <artifactId>maven-surefire-plugin</artifactId>
             <configuration>
               <redirectTestOutputToFile>false</redirectTestOutputToFile>
+              <forkCount>1</forkCount>
             </configuration>
           </plugin>
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-failsafe-plugin</artifactId>
             <configuration>
               <redirectTestOutputToFile>false</redirectTestOutputToFile>
+              <forkCount>1</forkCount>
             </configuration>
           </plugin>
         </plugins>

vertx/feign-vertx/src/test/java/feign/vertx/AbstractClientReconnectTest.java

@@ -27,6 +27,7 @@
 import io.vertx.core.Vertx;
 import io.vertx.junit5.VertxTestContext;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 import org.junit.jupiter.api.*;
@@ -50,8 +51,9 @@ static void setupMockServer() {
 
   @Test
   @DisplayName("All requests should be answered")
-  void allRequestsShouldBeAnswered(VertxTestContext testContext) {
+  void allRequestsShouldBeAnswered(VertxTestContext testContext) throws InterruptedException {
     sendRequests(10).compose(responses -> assertAllRequestsAnswered(responses, testContext));
+    testContext.awaitCompletion(1, TimeUnit.MINUTES);
   }
 
   @Nested