Adopt testify/require in viperutil tests
Adopt testify/require in viperutil tests

Signed-off-by: Matthew Sykes <fb2dd171fe47bac8d5b55d1d785c243b0892e206@gmail.com>

stemlending/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric,manish-sethi/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,stemlending/fabric,hyperledger/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,hyperledger/fabric,jimthematrix/fabric