EndpointRequest should match @ServletEndpoint

This commit also changes the request matcher for MVC
endpoints to use an AntPathRequestMatcher instead of an
MvcRequestMatcher. The endpoint is always available
under the mapped endpoint path and this way the same matcher
can be used for both MVC and Jersey.

Fixes gh-17912

Co-authored-by: Phillip Webb <pwebb@pivotal.io>

spring-boot-samples/pom.xml

@@ -69,6 +69,7 @@
 		<module>spring-boot-sample-reactive-oauth2-client</module>
 		<module>spring-boot-sample-reactive-oauth2-resource-server</module>
 		<module>spring-boot-sample-secure</module>
+		<module>spring-boot-sample-secure-jersey</module>
 		<module>spring-boot-sample-secure-webflux</module>
 		<module>spring-boot-sample-servlet</module>
 		<module>spring-boot-sample-session</module>