split out audit facet and listener to match others
by placing these in the metadata model / API they can be used more broadly,
while the storage-dependant implementation can be in a plugin. This means the
plugins can be removed from the admin implementation, which can then be used
(as required) in the CLI
[MRM-1504] Add a new module for repository administration management
split the repo admin in two modules : api and default implementation (to be able to more easily change the impl).
Use the repo admin api consumers and indexing modules.
git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1170135 13f79535-47bb-0310-9956-ffa450edef68