Add TagpoolManager to vumi.application API.
Add TagpoolManager to vumi.application API.

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