[SERVER] Surf Server Minor Updates

[Byte]

Changes are:

• Removed surf_greatriver_remix_final
  
  
• Removed surf_greatriver_xdream_ctfix
  
• Added surf_greatriver_xdream_invex
  
• Fixed a bug where the suicide bomb would not appear on T players maps (radar) when dropped
  

The surf_greatriver_xdream_invex is an exact copy of the surf_greatriver_xdream_ctfix map. We will add some map bug fixes and additional features to it in the future.
This map also comes with a shiny new radar image: