Overriding LaunchAzimuth

[Patrykz94]

I noticed that according to the documentation, the global controls lexicon has an optional key launchAzimuth which is supposed to override the automatic azimuth calculation, however, that key in controls is never used in the code, instead there is a check if launchAzimuth exists on the mission lexicon and if not, it is being calculated and added to mission.

I think it makes more sense to have it on the mission lexicon since I'd imagine this would be used for specific missions, rather than on a specific vehicle, so it would be good to update the docs to fix this.