Doomsday Heist Vehicle Paint Jobs Get a Refresh

Updated spawn colors for the mpchristmas2017 vehicles. This update added some really cool vehicles. Here are new colors for them.

Installation:
- Take the carvariations.meta file from the archive and drop it in mods/update/x64/dlcpacks/mpchristmas2017/common/data

Color references are from real life and personal preference.