use guice no_aop which is faster for our usage

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1519361 13f79535-47bb-0310-9956-ffa450edef68
ensure we send a User-Agent header when requesting a remote repository

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1519362 13f79535-47bb-0310-9956-ffa450edef68