Error handling when awscli not configured

[fstab50]

Originally reported by: Blake Huber (Bitbucket: blakeca00, GitHub: Unknown)

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provide error handling and messaging in log output when profiles not setup in awscli instead of failing catastrophically.

"You must run:

$ aws --configure

"

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• Bitbucket: https://bitbucket.org/blakeca00/stsaval/issue/16