Upgrade to MongoDB 4.2.2

Closes gh-25675

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mongo/MongoReactiveAutoConfigurationTests.java

@@ -25,7 +25,6 @@ import com.mongodb.connection.AsynchronousSocketChannelStreamFactoryFactory;
 import com.mongodb.connection.StreamFactory;
 import com.mongodb.connection.StreamFactoryFactory;
 import com.mongodb.connection.netty.NettyStreamFactoryFactory;
-import com.mongodb.internal.async.client.AsyncMongoClient;
 import com.mongodb.reactivestreams.client.MongoClient;
 import io.netty.channel.EventLoopGroup;
 import org.junit.jupiter.api.Test;
@@ -113,8 +112,7 @@ class MongoReactiveAutoConfigurationTests {
 
 	private MongoClientSettings getSettings(ApplicationContext context) {
 		MongoClient client = context.getBean(MongoClient.class);
-		AsyncMongoClient wrappedClient = (AsyncMongoClient) ReflectionTestUtils.getField(client, "wrapped");
-		return (MongoClientSettings) ReflectionTestUtils.getField(wrappedClient, "settings");
+		return (MongoClientSettings) ReflectionTestUtils.getField(client, "settings");
 	}
 
 	@Configuration(proxyBeanMethods = false)

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mongo/ReactiveMongoClientFactoryTests.java

@@ -19,7 +19,6 @@ package org.springframework.boot.autoconfigure.mongo;
 import java.util.List;
 
 import com.mongodb.MongoClientSettings;
-import com.mongodb.internal.async.client.AsyncMongoClient;
 import com.mongodb.reactivestreams.client.MongoClient;
 
 import org.springframework.test.util.ReflectionTestUtils;
@@ -41,8 +40,7 @@ class ReactiveMongoClientFactoryTests extends MongoClientFactorySupportTests<Mon
 
 	@Override
 	protected MongoClientSettings getClientSettings(MongoClient client) {
-		AsyncMongoClient wrapped = (AsyncMongoClient) ReflectionTestUtils.getField(client, "wrapped");
-		return (MongoClientSettings) ReflectionTestUtils.getField(wrapped, "settings");
+		return (MongoClientSettings) ReflectionTestUtils.getField(client, "settings");
 	}
 
 }

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1206,7 +1206,7 @@ bom {
 			]
 		}
 	}
-	library("MongoDB", "4.2.0-beta1") {
+	library("MongoDB", "4.2.2") {
 		group("org.mongodb") {
 			modules = [
 				"bson",