Contract Formations fail due to low fees

[peterjan]

contract formation failed, err: couldn't form contract: FormContract: ReadResponse: communication error: rejected for including too few transaction fees

Happens on testnet quite frequently for me. Definitely something we should tackle I think, kind of a lame reason for a contract formation to fail.

[mike76-dev]

Seen it, too, also on the mainnet. Fixed by multiplying the cm.RecommendedFee() by 3.

[ChrisSchinnerl]

This should resolve itself once we use rhpv4 for forming contracts. rhpv2 doesn't have a pricetable containing the expected fees of the host.