NEXUS-5472: Javadoc
NEXUS-5472: Getting rid of PathMatcher iface

Reducing unneeded ifaces
NEXUS-5472: Reducing iface count

Removing more ifaces
NEXUS-5472: Getting rid of warnings
NEXUS-5472: IT fixes

Two IT was failing, as scraping of Central was assumed in them.
But since 14th Feb 2013 the prefix file is deployed.