GCW Invasions partial commit 1

This commit fixes a lot of faction, GCW and AI-related issues. The individual commits have the details.
The AI refinements are ongoing and will be further tweaked with the feedbacks from testing.
The invasions are for now ONLY intended for local TEST(!) during phase 2 and do not repeat. 
The following issues are known already :
- Walkers do not show laser bolts when firing. Cannot be fixed currently.
- Spawners use Dejarik-item as temporary template. Reason: The actual iff would only spawn a white placeholder object in the client. This could be due to a corruption in client patch 53.
- Entertainers can't buff constructors. Still needs to be done.
- There are no invasion quests. Reason: No PSWG-wide Quest system exists yet.
- NPCs might run through buildings while chasing players. Reason: AI Pathfinding is not yet implemented