Polish "Use non-blocking API in CouchbaseReactiveHealthIndicator"

See gh-32505

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/couchbase/CouchbaseReactiveHealthIndicator.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.actuate.couchbase;
 
-import com.couchbase.client.core.diagnostics.DiagnosticsResult;
 import com.couchbase.client.java.Cluster;
 import reactor.core.publisher.Mono;
 
@@ -46,7 +45,7 @@ public class CouchbaseReactiveHealthIndicator extends AbstractReactiveHealthIndi
 
 	@Override
 	protected Mono<Health> doHealthCheck(Health.Builder builder) {
-		return this.cluster.reactive().diagnostics().map(diagnostics -> {
+		return this.cluster.reactive().diagnostics().map((diagnostics) -> {
 			new CouchbaseHealth(diagnostics).applyTo(builder);
 			return builder.build();
 		});

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/couchbase/CouchbaseReactiveHealthIndicatorTests.java

@@ -30,10 +30,10 @@ import com.couchbase.client.core.service.ServiceType;
 import com.couchbase.client.java.Cluster;
 import com.couchbase.client.java.ReactiveCluster;
 import org.junit.jupiter.api.Test;
+import reactor.core.publisher.Mono;
 
 import org.springframework.boot.actuate.health.Health;
 import org.springframework.boot.actuate.health.Status;
-import reactor.core.publisher.Mono;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.BDDMockito.given;