When we copy/paste a pivot chart to another (new) document, we
"send" a chart data as ODC to the other document. In the new
document we can't use the pivot table (as there is none in this
document) so we read-in the table data from the document to the
internal data provider.
The problem was that we didn't match the (fake) range names from
the pivot table correctly in the internal data provider and the
data wasn't populated. This commit fixes that and changes the fake
range names to something that is easy to parse and matches the
names in internal data provider.

Change-Id: I9872160cca68abd91738a25bf9b3b27bc77ce38d
Reviewed-on: https://gerrit.libreoffice.org/37086Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>