Fix test in OidcTests

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/config/annotation/web/configurers/OidcTests.java

@@ -36,6 +36,7 @@ import org.junit.Test;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
@@ -422,6 +423,7 @@ public class OidcTests {
 	}
 
 	@EnableWebSecurity
+	@Configuration
 	static class AuthorizationServerConfigurationWithTokenGenerator extends AuthorizationServerConfiguration {
 
 		// @formatter:off