Spectator spawned during map generation

[Cooldude2606]

Factorio version
Version number: 1.0.0

Scenario version
Version number: dev

Bug description
During the CnC test spectators (possiblty all players) were teleported to the surface before map generation was compelted. I feel that this might be caused by on_spectator_spawned being called before the map generation is completed.

Reproduction method
Steps to reproduce the behavior:

1. Start CnC game with spectators
2. Spectators get teleported stright away

Expected behavior
Spectators should not be teleported until the game starts, just like any game which doesnt use wait for map generation.

[Cooldude2606]

I cant reproduce this localy, this bug report was made because during JD's stream this bug occurred.