If the addons path does not contain enterprise, the industry module
cannot be installed since all of them rely on knowledge. The same
applies if there is a theme in the industry and that the design-themes
repository is not in the addons-path.
This commit raises a UserError in case the installation would fail due
to a missing repository in the addons-path.
closesodoo/odoo#147138
Signed-off-by: Pierre Masereel (pim) <pim@odoo.com>