Make management web security back off without spring-security-web

Closes gh-11474

Author: wilkinsona

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/ManagementWebSecurityAutoConfiguration.java

@@ -86,7 +86,7 @@
  */
 @Configuration
 @ConditionalOnWebApplication
-@ConditionalOnClass({ EnableWebSecurity.class })
+@ConditionalOnClass({ EnableWebSecurity.class, RequestMatcher.class })
 @AutoConfigureAfter(SecurityAutoConfiguration.class)
 @AutoConfigureBefore(FallbackWebSecurityAutoConfiguration.class)
 @EnableConfigurationProperties