Currently:
- template_structure_defensive_wall_long.xml, template_structure_defensive_wall_medium.xml, template_structure_defensive_wall_short.xml have template_structure_defensive_wall.xml as their parent (as should be)
- template_structure_defensive_wall_gate.xml has template_structure_defensive_wall_long.xml as its parent (name suggests otherwise)
- template_structure_defensive_wall_tower.xml has template_structure_defensive.xml as its parent (name suggests otherwise)
This patch:
- changes the parent of the *_wall_gate.xml and *_wall_tower.xml to *_wall.xml, which means all wall templates all have the same inheritance
- removes some duplication
- moves cost and health out of template_structure_defensive_wall.xml, because all its children have different values
- [EDIT]: removed different <RepairTimeRatio> from the gate template and tweaked <Cost/BuildTime> instead, to keep health/s the same