geoserver war build process could use maven and war could include geoserver_data

[simonp]

Currently uses ant with war and zip files. geoserver_data not in webapp which makes deployment a two step process.

Could use maven overlay. How:

• put current geoserver.war in localGeoNetwork maven repo
• put zip archives (styler.zip and chart-plugin.zip) in localGeoNetwork maven repo
• use maven to extract and overlay on local changes

Advantages:

• no need to modify geoserver web.xml anymore because default/built-in geoserver data directory can be excluded and replaced with current geoserver_data directory with geonetwork layers
• geoserver with data for GeoNetwork bundled in one war file - can be deployed in one step
• izpack installer can still be built from war in target