Fix logging inconsistances 

got rid of the logger that we create by ourselves and made it so we use
the JavaPlugin's logger that we get when we inherit JavaPlugin. As a
result we can't make the log method static anymore, but we have access
to the JavaPlugin instance its fine. Also made it so that Database takes
a Logger param in the constructor and uses that rather then the static
log() method in JukeAlert that isn't there anymore