This removes all of the global loggers from the project and replaces them with loggers which are instantiated in vspd.go and passed down as params.
To support this, the background package was removed. It only contained one file so it was a bit pointless anyway. It only existed so background tasks could have their own named logger.
`CanTicketVote` doesn't really fit into the RPC client code as it is more of a business logic function. Moving it into the webapi package is more appropriate.
Running as sub-tests has the benefit of automatically logging the test name, no need to include it in failure messages manually. It even works if the test panics.
