Add a (non-gui) setting GeneratorOverride that, if set, is used for odt/docx/pdf generator string identifying the application that has written it instead of the normal productname etc. string. Change-Id: Ibe12a063e7e6b5a09c69cdf66cba073793650d62 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/132495 Tested-by: Jenkins Reviewed-by: Luboš Luňák <l.lunak@collabora.com>