Update OAuth2 config following changes in Spring Security DSL

Closes gh-14169

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerWebSecurityConfiguration.java

@@ -42,8 +42,8 @@ class ReactiveOAuth2ResourceServerWebSecurityConfiguration {
 	@Bean
 	@ConditionalOnMissingBean
 	public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
-		http.authorizeExchange().anyExchange().authenticated().and().oauth2()
-				.resourceServer().jwt().jwtDecoder(this.jwtDecoder);
+		http.authorizeExchange().anyExchange().authenticated().and()
+				.oauth2ResourceServer().jwt().jwtDecoder(this.jwtDecoder);
 		return http.build();
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/servlet/OAuth2ResourceServerWebSecurityConfiguration.java

@@ -37,8 +37,8 @@ class OAuth2ResourceServerWebSecurityConfiguration {
 
 		@Override
 		protected void configure(HttpSecurity http) throws Exception {
-			http.authorizeRequests().anyRequest().authenticated().and().oauth2()
-					.resourceServer().jwt();
+			http.authorizeRequests().anyRequest().authenticated().and()
+					.oauth2ResourceServer().jwt();
 		}
 
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerAutoConfigurationTests.java

@@ -146,7 +146,7 @@ public class ReactiveOAuth2ResourceServerAutoConfigurationTests {
 		SecurityWebFilterChain testSpringSecurityFilterChain(ServerHttpSecurity http,
 				ReactiveJwtDecoder decoder) {
 			http.authorizeExchange().pathMatchers("/message/**").hasRole("ADMIN")
-					.anyExchange().authenticated().and().oauth2().resourceServer().jwt()
+					.anyExchange().authenticated().and().oauth2ResourceServer().jwt()
 					.jwtDecoder(decoder);
 			return http.build();
 		}

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -166,7 +166,7 @@
 		<spring-plugin.version>1.2.0.RELEASE</spring-plugin.version>
 		<spring-restdocs.version>2.0.2.RELEASE</spring-restdocs.version>
 		<spring-retry.version>1.2.2.RELEASE</spring-retry.version>
-		<spring-security.version>5.1.0.RC1</spring-security.version>
+		<spring-security.version>5.1.0.BUILD-SNAPSHOT</spring-security.version>
 		<spring-session-bom.version>Bean-M2</spring-session-bom.version>
 		<spring-ws.version>3.0.3.RELEASE</spring-ws.version>
 		<sqlite-jdbc.version>3.23.1</sqlite-jdbc.version>