Add agent region information to the lookup.
Don't handle non specified aws configuration options for now.
Create regional connection objects. Lookups are also regional.
Extract method for checking validity of aws regions names.
Stackname is only unique per region, so cache keys are region specific.
Public functions near the top of the class.
Better logging of initial configuration errors. Class variables commented and added together.
Remove the fallback to iams or dot files until we better understand how multiregion hiera should work in these instances
Improved messaging.
Reduce log verbosity and add region to lookup debug messages.
Explicity set the cache timeouts.