`version` should be well protected (#7840)
`version` should be well protected (#7840)

* version should be well protected

* log local version, so do not need lock protection

* replace Infof with Debugf

geeknoid/istio,geeknoid/istio,geeknoid/istio,smawson/istio,geeknoid/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,istio/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,geeknoid/istio,geeknoid/istio