Deselect records before selection to avoid (bug) selection model keeping the old model
[NX-538] Add component metadata api with OrientDB impl
Merge pull request #598 from sonatype/componentmetadata

[NX-538] OrientDB Component Metadata Impl
[NEXUS-6692] Fix url validation, pending how to make this exposed generally for vtype: 'url'.
Defer jetty activation by launching it asynchronously and waiting for the internal listener+filter, also update the delegating filter to set status to 503 when delegate is not available.