Use randomly generated values of the correct length in test Tickets, rather than using hard-coded and unrealistic values. This code was produced to aid with benchmarking DB performance.
Also fixing some minor typos/errors noticed while working in this file.
- Fee tx status is now tracked using a dedicated field, with values none/received/broadcast/confirmed/error.
- Fee tx hex and hash are now both set in /payfee. The absense of txhash is no longer used to determine if a fee tx has been broadcast or not.
- setvotechoices can no longer be called before a fee is received.
- Remove `binding:required` from response types. It has no effect on responses, it is only needed on request types which are validated by gin.
