Migrate `spring.view.prefix` and `spring.view.suffix` to
`spring.mvc.view.prefix` and `spring.mvc.view.suffix` respectively. The
former properties are still handled in a backward compatible way and are
defined as deprecated in the meta-data.
Closes gh-3250
Switch the Tomcat 8 and Jetty 9 samples to Tomcat 7 and Jetty 8. Since
Tomcat 8 and Jetty 9 are now the default versions the previous samples
are no longer relevant, however, we do need integration tests to check
that we remain compatible with Tomcat 7 and Jetty 8.
See gh-1832
Andy Wilkinson
Phillip Webb
Stephane Nicoll