Remove snappy as it can have issues with unpacking/deleting of native lib under tmp when restarting, instead set OrientDB compression to 'nothing' based on latest advice: http://stackoverflow.com/a/25114789
Upgrade pax-swissbox to 1.7.1 to pick up fix for https://ops4j1.jira.com/browse/PAXSB-75
Install Nexus features in stages (boot->edition->plugins)