Adopt economyFee recommendation from mempool rate provider.

[ghost]

From bisq-network/proposals#343 (comment)

Jun-06 10:46:25.182 [Timer-17] INFO  b.p.m.p.MempoolFeeRateProvider$Fourth: Retrieved estimated mining fee of 10 sat/vB and economyFee of 1 sat/vB from mempool.bisq.services 
Jun-06 10:46:25.182 [Timer-17] INFO  b.p.m.p.MempoolFeeRateProvider$Fourth: refresh took 247 ms. 
Jun-06 10:46:25.390 [Timer-18] INFO  b.p.m.p.MempoolFeeRateProvider$First: Retrieved estimated mining fee of 10 sat/vB and economyFee of 2 sat/vB from mempool.space 
Jun-06 10:46:25.390 [Timer-18] INFO  b.p.m.p.MempoolFeeRateProvider$First: refresh took 454 ms. 
Jun-06 10:46:25.653 [Timer-20] INFO  b.p.m.p.MempoolFeeRateProvider$Second: Retrieved estimated mining fee of 10 sat/vB and economyFee of 1 sat/vB from mempool.emzy.de 
Jun-06 10:46:25.653 [Timer-20] INFO  b.p.m.p.MempoolFeeRateProvider$Second: refresh took 717 ms. 
Jun-06 10:46:25.662 [Timer-19] INFO  b.p.m.p.MempoolFeeRateProvider$Third: Retrieved estimated mining fee of 10 sat/vB and economyFee of 2 sat/vB from mempool.ninja 
Jun-06 10:46:25.662 [Timer-19] INFO  b.p.m.p.MempoolFeeRateProvider$Third: refresh took 726 ms. 

[wiz]

@jmacxx thanks for making this PR so quickly. however, are we sure that all the bugs in bisq's fee calculation have been fixed so that the 1 sat/vByte fee withdrawal doesn't cause rounding errors down to 0.999 sat/vByte as it did a few years ago - will need to test this inside bisq :)

[wiz]

another thing is that we will need to ship mempool v2.4 and have emzy and devin upgrade their mempool instances before we can merge this PR

[wiz]

here is the original 1 sat/vByte issue for context, I believe it was fixed when SegWit was added into Bitcoin but we need to test #3306

[wiz]

ok @Emzy @devinbileck can you please upgrade to mempool v2.4.0 so we can proceed with testing this PR
https://github.com/mempool/mempool/releases/tag/v2.4.0

[Emzy]

ok @Emzy @devinbileck can you please upgrade to mempool v2.4.0 so we can proceed with testing this PR https://github.com/mempool/mempool/releases/tag/v2.4.0

Done.

[devinbileck]

mempool.bisq.services has been upgraded to 2.4.0

[wiz]

ok so out of all the mempool nodes in https://github.com/bisq-network/bisq/blob/master/pricenode/src/main/resources/application.properties
we can now see that economyFee is provided by:
https://mempool.space/api/v1/fees/recommended
https://mempool.emzy.de/api/v1/fees/recommended
https://mempool.ninja/api/v1/fees/recommended
https://mempool.bisq.services/api/v1/fees/recommended

[ripcurlx]

utACK