Update Galaxy Generation to be more balanced

Have generated multiple games to look at the maps I have noticed certain disturbing issues on map generation.

• With large player counts 9+, some players must share a constellation while others are alone.
• On Spiral galaxies the central 'empty' constellation is one third the size of a normal constellation casuing minimal struggle for control.
• On Ring galaxies there is an empty 'central' constellation on part of the inside of the ring leaving the nearby faction an easy place to expand.
• The minor factions are clustered in the small 'empty' constellation often causing it to be half colonized from the start of the game.
• Some map geometries cause constellations to be cut in half leaving an additional empty constellation and one player alone in a half size constellation. (See Yellow player on 12p, Ring, Colossal, High, 50488)

Fixes:

• On Constellations Many, each player should always recieve their own constellation.
• Ring, Ovoid, and Disk-4 galaxies should not have an 'empty' constellation.
• Minor factions should be more evenly distributed amongst the constellations.