Use Tomcat instead of old Jetty 6 for tests

Various Jetty* test classes are renamed to ServletContainer*: JettyFeature -> ServletContainerFeature JettyTransactionalFeature -> ServletContainerTransactionalFeature @Jetty(port = ...) -> @ServletContainer(port = ...) Configuring the servlet container to add servlets, filters or listeners is now done through extension points. The syntax is based on the standard web.xml, with an additional context attribute: <extension target= "org.nuxeo.runtime.server" point= "servlet" > <servlet context= "/" > <servlet-name> My Servlet </servlet-name> <servlet-class> org.nuxeo.example.MyServlet </servlet-class> <url-pattern> /* </url-pattern> <init-param> <param-name> myparam </param-name> <param-value> myvalue </param-value> </init-param> </servlet> </extension> <extension target= "org.nuxeo.runtime.server" point= "filter" > <filter context= "/" > <filter-name> My Filter </filter-name> <filter-class> org.nuxeo.example.MyFilter </filter-class> <filter-mapping> <url-pattern> /* </url-pattern> <dispatcher> REQUEST </dispatcher> <dispatcher> FORWARD </dispatcher> </filter-mapping> <init-param> <param-name> myparam </param-name> <param-value> myvalue </param-value> </init-param> </filter> </extension> <extension target= "org.nuxeo.runtime.server" point= "listener" > <listener context= "/" > <listener-class> org.nuxeo.example.MyListener </listener-class> </listener> </extension>