[MRM-1293] introduce repository statistics as a new plugin that operates over the metadata repository. Currently a work in progress - repository size statistics are not stored, and only the scanner and scheduler have been hooked in (meaning reports will be out of date)
archiva/branches/MRM-1025/archiva-modules/archiva-base/archiva-proxy/src/main/java/org/apache/maven/archiva/proxy/DefaultRepositoryProxyConnectors.java
archiva/branches/MRM-1025/archiva-modules/archiva-base/archiva-proxy/src/test/java/org/apache/archiva/