Don't load demo data on regular install (#281)
Don't load demo data on regular install (#281)

--- otherwise the module is uninstallable
brain-tec/account-invoicing,kmee/account-invoicing,kmee/account-invoicing,eezee-it/account-invoicing,open-synergy/account-invoicing,acsone/account-invoicing,acsone/account-invoicing,brain-tec/account-invoicing