OLDPRODUCT2 - it was a workaround for OOo 1.9, obsolete
SAMEPRODUCTS - same product have the same ProductCode, so installer detect it
anyway under normal circumstances. It is possible that a tester/developer tries
to install the same version with different ProductCode over an existing installation
(e.g. dailyes or RCs). Then we are in trouble. However, SAMEPRODUCTS was not in use.
Moreover, Windows Installer uses only the first three fields of the product version.
So we cannot make difference between e.g. 4.0.3.1 and 4.0.3.2, and this is the new versioning
scheme.
BETAPRODUCTS - LibreOffice have never used different upgrade code (BETAUPGRADECODE) for betas.
OLDPRODUCTSPATCH, SAMEPRODUCTSPATCH, NEWPRODUCTSPATCH - related to old Star Division patching
mechanism, they were commented out anyway.
STUBPRODUCTS, STUBUPGRADECODE - these look useless

Change-Id: I77d67b72e18fa6b3ba4182b99e198c42f247cea4