Credentials profile error messaging (#381)
Credentials profile error messaging (#381)

* print message if aws key and secret not available in test/data/credentials for  process.env.AWS_PROFILE

Co-authored-by: moeen mohsin <bb66ef728d49c95b7b35f28164417c3a6a7882bd@circles.asia>
aws/aws-iot-device-sdk-js,aws/aws-iot-device-sdk-js