Fix invalid PDU in SMPP tests. (@Hodgestar)
Fix invalid PDU in SMPP tests. (@Hodgestar)

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