Fix init information in config.go
Fix init information in config.go

Replace "group" with "affiliation" in cmd/fabric-ca-client/config.go:129.
Otherwise, it will report that [FATAL] Registration request does not have an affiliation.

Change-Id: I033c77d25634125456426c16e333884718b79535
Signed-off-by: guhaihua <238867962161f85c9c0b460168c32302d56b2f41@wanda.cn>

saadk10/fabric-ca,saadk10/fabric-ca