Move XEnumeration Java tests to C++
for ScIndexEnumeration_DataPilotItemsEnumeration.
It's also the last test in the group JunitTest_sc_unoapi_5,
we finally could remove that target from the Makefile.

Change-Id: I560c1ca691f0019ac4da99bde3c599b4ba22fb68
Reviewed-on: https://gerrit.libreoffice.org/63690
Tested-by: Jenkins
Reviewed-by: Jens Carl <j.carl43@gmx.de>