rP22257 introduced new cattle templates. Unfortunately, they contained mistakes. This patch corrects them:
- removes unnecessary <Civ>gaia</Civ>, because all units and gaia objects already have this by default
- add <GenericName>
- correct <SpecificName> capitalization: in scientific names Genus is always capitalized, species and subspecies never.
- moved shared parent: template_unit_fauna_hunt_passive_cattle.xml → template_unit_fauna_herd_domestic_cattle.xml
- added European cow to gaul corral and Sanga cattle to kush corral so they can get used
Also removed duplication from the new horse templates introduced in rP22260.