Record view / contact focus on feature: allow to customise the contact field name to filter

[josegar74]

In the metadata page, clicking on a contact shows an option to filter by the organisation name:

The filter was hardcoded to use the field OrgForResourceObject.default, to filter by the resource contact. Updated the code to configure the field name depending on the type of contact displayed.

In the previous example, for a metadata contact, the query was not showing any result:

http://localhost:8080/geonetwork/srv/eng/catalog.search?debug#/search?query_string=%7B%22OrgForResourceObject.default%22:%7B%22FAO%20-%20NRCW%22:true%7D%7D

With the change, the query shows the results properly:

http://localhost:8080/geonetwork/srv/eng/catalog.search?debug#/search?query_string=%7B%22OrgObject.default%22:%7B%22FAO%20-%20NRCW%22:true%7D%7D

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