Move XEnumeration Java test to C++
for ScIndexEnumeration_SubTotalFieldsEnumeration.

Change-Id: Ibe2b283e99230c5e517eb80858ff31459f2c9844
Reviewed-on: https://gerrit.libreoffice.org/63627
Tested-by: Jenkins
Reviewed-by: Jens Carl <j.carl43@gmx.de>