Move XEnumeration Java tests to C++
for ScIndexEnumeration_DataPilotFieldsEnumeration.

Change-Id: Iac7c60c3971756bcc47fc68a4aa86b442af266c5
Reviewed-on: https://gerrit.libreoffice.org/63506
Tested-by: Jenkins
Reviewed-by: Jens Carl <j.carl43@gmx.de>