Install Technoheaven - THV Version 216

[oscar]

Update(Avail) GRTE now able to return cancell policies at avail step

Closes ITHV-146

Sellers at 2022-06-23:

• Zahara Tours - [ZHR]
• Rayna Tours - [RAY]
• Guarantee Travel - [GRTE]
• Within Earth - [WTE]
• Travelbullz - [TVZ]