Civilization selection non-deterministic

[fire-eggs]

• initial RNG seed is 7595
• select large, otherwise all the default OR select Earth
• King, 7 civs, china is player

Sometimes getting India, other times getting Mongols. Should always be the same.

[fire-eggs]

Unit tests should now behave consistently.

However, unit-tests vs actually playing the game are not consistent, even with the same RNG seed. The actual game play may be calling the RNG a large number of times before the Game constructor is invoked. Need to investigate further.