use namespace for creating ca-cert.pem file. (#2021)
use namespace for creating ca-cert.pem file. (#2021)

This namespace is used for getting secretToken, but missing for
getting its content.
smawson/istio,istio/istio,smawson/istio,geeknoid/istio,istio/istio,frankbu/istio,frankbu/istio,istio/istio,geeknoid/istio,smawson/istio,smawson/istio,frankbu/istio,istio/istio,frankbu/istio,smawson/istio,geeknoid/istio,smawson/istio,frankbu/istio,geeknoid/istio,frankbu/istio,geeknoid/istio,geeknoid/istio,istio/istio