Rename body(Object) to bodyValue

The recently added body(Object) variant can be confused easily with
body(Publisher, Class) forgetting to provide the element type and
only running into the IllegalArgumentException at runtime.

See gh-23212

spring-test/src/test/java/org/springframework/test/web/reactive/server/ApplicationContextSpecTests.java

@@ -61,7 +61,7 @@ public class ApplicationContextSpecTests {
 					.GET("/sessionClassName", request ->
 							request.session().flatMap(session -> {
 								String className = session.getClass().getSimpleName();
-								return ServerResponse.ok().body(className);
+								return ServerResponse.ok().bodyValue(className);
 							}))
 					.build();
 		}

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ErrorTests.java

@@ -63,7 +63,7 @@ public class ErrorTests {
 		EntityExchangeResult<Void> result = this.client.post()
 				.uri("/post")
 				.contentType(MediaType.APPLICATION_JSON)
-				.body(new Person("Dan"))
+				.bodyValue(new Person("Dan"))
 				.exchange()
 				.expectStatus().isBadRequest()
 				.expectBody().isEmpty();

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/JsonContentTests.java

@@ -82,7 +82,7 @@ public class JsonContentTests {
 	public void postJsonContent() {
 		this.client.post().uri("/persons")
 				.contentType(MediaType.APPLICATION_JSON)
-				.body("{\"name\":\"John\"}")
+				.bodyValue("{\"name\":\"John\"}")
 				.exchange()
 				.expectStatus().isCreated()
 				.expectBody().isEmpty();

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ResponseEntityTests.java

@@ -145,7 +145,7 @@ public class ResponseEntityTests {
 	@Test
 	public void postEntity() {
 		this.client.post()
-				.body(new Person("John"))
+				.bodyValue(new Person("John"))
 				.exchange()
 				.expectStatus().isCreated()
 				.expectHeader().valueEquals("location", "/persons/John")

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/XmlContentTests.java

@@ -116,7 +116,7 @@ public class XmlContentTests {
 
 		this.client.post().uri("/persons")
 				.contentType(MediaType.APPLICATION_XML)
-				.body(content)
+				.bodyValue(content)
 				.exchange()
 				.expectStatus().isCreated()
 				.expectHeader().valueEquals(HttpHeaders.LOCATION, "/persons/John")

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/HttpServerTests.java

@@ -45,7 +45,7 @@ public class HttpServerTests {
 	@BeforeEach
 	public void start() throws Exception {
 		HttpHandler httpHandler = RouterFunctions.toHttpHandler(
-				route(GET("/test"), request -> ServerResponse.ok().body("It works!")));
+				route(GET("/test"), request -> ServerResponse.ok().bodyValue("It works!")));
 
 		this.server = new ReactorHttpServer();
 		this.server.setHandler(httpHandler);

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/bind/RouterFunctionTests.java

@@ -41,7 +41,7 @@ public class RouterFunctionTests {
 	public void setUp() throws Exception {
 
 		RouterFunction<?> route = route(GET("/test"), request ->
-				ServerResponse.ok().body("It works!"));
+				ServerResponse.ok().bodyValue("It works!"));
 
 		this.testClient = WebTestClient.bindToRouterFunction(route).build();
 	}