[MRM-1747] upgrade to last modello.

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-core/trunk@1446826 13f79535-47bb-0310-9956-ffa450edef68
add modello snapshots repo

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-core/trunk@1446827 13f79535-47bb-0310-9956-ffa450edef68