Implement tests for non-USSD ssmi callbacks.
Implement tests for non-USSD ssmi callbacks.

TouK/vumi,vishwaprakashmishra/xmatrix,TouK/vumi,harrissoerja/vumi,vishwaprakashmishra/xmatrix,vishwaprakashmishra/xmatrix,TouK/vumi,harrissoerja/vumi,harrissoerja/vumi