ade7ea5fcf psbt: replace the fee rate magic numbers with named constants in tests (frankomosh)
Pull request description:
Replace a hardcoded fee rate numbers in PSBT high-fee checks test with named constants.
Close#4378
ACKs for top commit:
tcharding:
ACK ade7ea5fcf
apoelstra:
ACK ade7ea5fcfc1d00a7cb3c35b4022a4543a7efe1d; successfully ran local tests
Tree-SHA512: fa02217940ae32f00164c762c82ecb6bd28da58e5ad44165124a7ad44367d7d0f752e7ab189b991edb2460c449bbd0a83df16a47b082f6755bd9e9d38e398cd8