Fix(Book, Cancel): fix provider api version to RSOL
Closes ITPN-263
Sellers at 2021-12-28:
- TourEast (Tourplan) - [TPET]
- AC Tours Group - [ACG]
- Exo Travel - [EXO]
- Asa Tours - [ASAT]
- Res Solutions - [RSOL]
- Abbey Tours - [ABT]
- Tahiti Nui Travel - [TTI]
- Eurotur - [EURT]
- ASA London - [ASA]
- Private Safaris - [PSAF]
- TourPlan - [TPN]
- Flying Europe - [FLEU]