use absolute URLs for ISO browse graphic metadata

[tomkralidis]

(using tryunk) Example of ISO output from CSW:

         <gmd:graphicOverview xmlns:srv="http://www.isotc211.org/2005/srv">
            <gmd:MD_BrowseGraphic>
               <gmd:fileName>
                  <gco:CharacterString>461bc494-5b27-4538-80c0-9451c1e5d73b_s.png</gco:CharacterString>
               </gmd:fileName>
               <gmd:fileDescription>
                  <gco:CharacterString>thumbnail</gco:CharacterString>
               </gmd:fileDescription>
               <gmd:fileType>
                  <gco:CharacterString>png</gco:CharacterString>
               </gmd:fileType>
            </gmd:MD_BrowseGraphic>

the path to the image should be a URL, so that CSW clients can use accordingly.

[ticheler]

This enhancement will need a discussion. Possibly it makes sense to have a full URL for CSW queries.

[Fxp]

Path to thumbnail should look like this : ​http://localhost:8080/geonetwork/srv/en/resources.get?id=24&access=public&fname=thumbnail_s.png

Options are:

• a) update-fixed-info.xsl for general use
• b) csw mapping ogc-*.xsl, iso-*.xsl

What's better ?