upgrade to last spring version

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1544407 13f79535-47bb-0310-9956-ffa450edef68
upgrade plexus-utils version

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1544408 13f79535-47bb-0310-9956-ffa450edef68
more upgrade

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1544409 13f79535-47bb-0310-9956-ffa450edef68