Codex: CSM bug fixes

fixed heavy weapons upgrade being selected in units less than 5 chosen
and the champion. Closes #535
Fixed VoTLW upgrade on possessed. Closes #534
Fixed Abaddon selecting chosen as troops flags. Closes #533
Added Flags for Cult Units to not be taken as elites when troops. Closes
#532
Moved Terminator Heavy Weapons, set modifiers for their selection.
Fixed Power Weapon cost issue in Terminator Lord. Closes #529