Demo collection improvement

[davidb]

Now we have Restful URLs for Greenstone3, the lucene-jdbm-demo collection should be switched to using OIDtype metadata, so its document identifiers can be even swisher than the HASHxxxx form. There should be a way to put this into the collection configuration file so it happens automatically, rather then the person building the collection needing to remember to add it in on the command line.

[kjdon]

This has been done. collectConfig now includes <importOption name="OIDtype" value="dirname"/>