Java type leaks into template info object

[serefarikan]

The aql builder backend returns type temporal_accessor for the leaf node in template: Virologischer Befund.

That's a java type, not an RM type, the rm type should be string based on the path of the field.
I guess this is due to backend somehow using the java type binding of dv_date_time/value instead of the RM type.

Simply retrieving the template information for the above template should replicate the issue.
Lars Schafer identified this problem and it is probably stopping us from using the RM type information of the path in various use cases, especially if parameters are used (UI, query execution etc)