Add autoconfig support for Jersey (2)

Jersey 2 has some Spring support built in but it's a bit awkward to
use in a Boot app, so autoconfiguration seems appropriate. The tests
and sample show how to use it, but the short story is that any
@Component can define JAX-RS endpoints via @GET etc.

There's a sample for Jersey 1 as well (pay careful attention to
the plugin configuration if you want to build an executable jar)

Fixes gh-1651

spring-boot-samples/pom.xml

@@ -37,6 +37,8 @@
 		<module>spring-boot-sample-flyway</module>
 		<module>spring-boot-sample-hornetq</module>
 		<module>spring-boot-sample-integration</module>
+		<module>spring-boot-sample-jersey</module>
+		<module>spring-boot-sample-jersey1</module>
 		<module>spring-boot-sample-jetty</module>
 		<module>spring-boot-sample-jta-atomikos</module>
 		<module>spring-boot-sample-jta-bitronix</module>