The config key ‘aws-region’ is no longer needed (it was specific to psiturk), so remove it and use another key in tests.
The config key ‘aws-region’ is no longer needed (it was specific to psiturk), so remove it and use another key in tests.

jcpeterson/Dallinger,Dallinger/Dallinger,Dallinger/Dallinger,Dallinger/Dallinger,jcpeterson/Dallinger,jcpeterson/Dallinger,Dallinger/Dallinger,jcpeterson/Dallinger,Dallinger/Dallinger,jcpeterson/Dallinger