migrated the following modules using parent-spring-5 to spring 5.1:

spring-mvc-simple
spring-security-mvc-custom
spring-security-mvc-login
spring-security-rest
spring-security-rest-basic-auth
spring-static-resources
spring-thymeleaf

spring-security-rest-basic-auth/src/main/java/org/baeldung/client/RestTemplateFactory.java

@@ -4,7 +4,7 @@ import org.apache.http.HttpHost;
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.http.client.ClientHttpRequestFactory;
-import org.springframework.http.client.support.BasicAuthorizationInterceptor;
+import org.springframework.http.client.support.BasicAuthenticationInterceptor;
 import org.springframework.stereotype.Component;
 import org.springframework.web.client.RestTemplate;
 
@@ -38,7 +38,7 @@ public class RestTemplateFactory implements FactoryBean<RestTemplate>, Initializ
         HttpHost host = new HttpHost("localhost", 8082, "http");
         final ClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactoryBasicAuth(host);
         restTemplate = new RestTemplate(requestFactory);
-        restTemplate.getInterceptors().add(new BasicAuthorizationInterceptor("user1", "user1Pass"));
+        restTemplate.getInterceptors().add(new BasicAuthenticationInterceptor("user1", "user1Pass"));
     }
 
 }

spring-security-rest-basic-auth/src/main/java/org/baeldung/spring/WebConfig.java

@@ -8,7 +8,6 @@ import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
-import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
 
 @Configuration
 @EnableWebMvc

spring-security-rest-basic-auth/src/test/java/org/baeldung/SpringContextIntegrationTest.java

@@ -6,7 +6,7 @@ import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 @RunWith(SpringJUnit4ClassRunner.class)
-@ContextConfiguration({ "/WebSecurityConfig.xml" })
+@ContextConfiguration({ "/webSecurityConfig.xml" })
 public class SpringContextIntegrationTest {
 
     @Test