Refactor migration methods to use some common utilities functions.
Refactor migration methods to use some common utilities functions.

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