go chaincode now sets the Asset owner as client identity certificate string (instead of base64 str)
Reason for the update: "GetClientIdentity().GetID()" api in go chaincode returns base64 string, while same api in java chaincode returns the same data as string
go & java chaincode sets same owner string
updated js app verify method
Signed-off-by: Sijo Cherian <sijo@ibm.com>