Hotfix update on the new maps

Hi,

here's a small hotfix update for the main issues on the two lasts maps.

Changelog :

• The transport helicopters won't fall through the ground anymore on Avalanche.
  
• Fixed a bug happening on Whisps of Hashima where only players where clipping to the roof of building when entering them. The bug only happened when the game is built and was caused by a collider used to place some vegetation on the roof that still collider with the playerController even if it was disabled.
  

Thank you for playing War Dust !