Revert "Disable listener by default, make bootstrap non-eager"

This reverts commit f7b8b0e8a1918ef2f2a3091081e81c2bb6738eb7.
Revert "Replace default capabilities impl with OrientDB impl"

This reverts commit 9877535292b61fae6f016d5a29bd21b01cde3675.
NX-487: consolidate bootstrapping code, remove nexus-webapp, get Jetty conf working in Karaf
Legacy test needs extra property when loading nexus config outside of the launcher
Deprecate 'runtime' property in favour of 'nexus-base'
Leave nexus-extender uber-bundle unpacked for now
Remove unused WAR tests (also remove duplicate nexus-ldap-plugin entry)