The Processor's coins folder referred to the networks it could process, as did
its Coin trait. This, and other similar cases throughout the codebase, have now
been corrected.
Also corrects dated documentation for a key pair is confirmed under the
validator-sets pallet.
Stops work where it does to the processor panickinng for Monero, yet not
Bitcoin, under what's present.
Cleans up processor tests to consolidate shared code.
