Pinger - hyperledger fabric chaincode ping extension

Often there is a need to find out if everything is correct with chaincode. To do it we would like to ping CC and know some information.

CCKit provides pinger extension for implementing ping opportunity in Hyperledger Fabric chaincodes. When chaincode will be pinged, you get information about invoker, his certificate and time.

Pinger implemented in two version:

1. As chaincode handlers
2. As service, that can be embedded in chaincode, using chaincode-as-service mode