CVS/JSON export (probably also other export) do not use grouping parameter for max count validation

[thomasegense]

The properties in solrwaybackweb.properties:
export.csv.maxresults=10000000
export.warc.maxresults=1000000
export.warc.expanded.maxresults=10000

Are used to stop too large export. But the count do not use the new groupField option.
When using the groupField parameter, there will be much fewer results.
(exportFields method in Facade.java).

Probably also in other export methods and not only CSV/JRON

[tokee]

Whoops, guess that's for me!