Threequel should have an option for setting the logging db context

[KevinFalank]

Currently when Threequel::Executioner (and perhaps Threequel::Commandant) execute a script, if the script changes the db context the gem will not be able to update the log entry for the execution once it finishes in the original database. Threequel should have an option for setting the logging db context so that the log entries can be updated regardless of a script context switch on the connection.

[blankenshipz]

Added #14 to address this for now, but as @jackross points out we may want to do this as part of the folder config.yml