Simplify mockmvc security in tests following upstream changes

SecurityMockMvcConfigurer now honors filter order so we can use that instead
of manually adding the filter.

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

@@ -181,6 +181,11 @@
 			<artifactId>postgresql</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.security</groupId>
+			<artifactId>spring-security-test</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.thymeleaf</groupId>
 			<artifactId>thymeleaf</artifactId>