O problema com o proxy a principio esta resolvido setando o proxy, adicionei na "target: resolve" no build.xml do ant assim:
<target name="resolve" description="--> Recupera as dependencias com ivy">
<setproxy proxyhost="seu_host" proxyport="80" proxyuser="seu_usuario" proxypassword="sua_senha"/>
Outro erro que esta ocorrendo é:
[jetty] 17-04-06 16:49:47,263 [INFO] br.com.caelum.vraptor.http.route.DefaultRouteBuilder - /apenas-tes
[jetty] 17-04-06 16:49:47,264 [INFO] br.com.caelum.vraptor.VRaptor - VRaptor 3.4.0 successfuly initiali
[jetty] 2017-04-06 16:49:47.329::WARN: failed SelectChannelConnector@0.0.0.0:8080
[jetty] java.net.BindException: Address already in use: bind
[jetty] at sun.nio.ch.Net.bind0(Native Method)
[jetty] at sun.nio.ch.Net.bind(Net.java:433)
[jetty] at sun.nio.ch.Net.bind(Net.java:425)
[jetty] at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
[jetty] at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
[jetty] at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216)
[jetty] at org.mortbay.jetty.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:315)