[z1883] Fix SCRIPT_COMMAND_SET_FACTION to check for expected Faction Templates and not factions

Please check your scripts! Note: Similar problems exist in other cases as well.

Signed-off-by: Klark20 <Klark20@online.de>
Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit 43d48a3)

(based on commit [s1454] - 2889912)