Set aside for when cataclysmbnteam/Cataclysm-BN#4051 is merged, mercifully this is vastly less of a pain in the ass as that PR was.

1. Removed the old, now-unneeded mapgen variant of the military base's armory, in favor of...
2. A new, less annoying to isolate and set up, variant of the armory basement that does much the same thing as the original variant. Swaps the military bots for the armed (previously unarmed) version of augmented undead soldiers, and swaps in the power armor and random military items for specifically the assortment of any random Cata++-specific military items.
3. Added an injection of military armor collections into new itemgroup military_ballistic_armor.
4. Likewise injected a few of relevant items into new itemgroup mil_armor_electronics.
5. The DDA version may also have armed variants of super soldier zeds in the armory, as a treat. :3