Clear redis keys at start of tagpool tests to avoid spurious failure when other tests are broken.
Clear redis keys at start of tagpool tests to avoid spurious failure when other tests are broken.

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