istioctl: improve error message when istio ConfigMap isn't found (#580)
istioctl: improve error message when istio ConfigMap isn't found (#580)

* istioctl: improve error message when istio ConfigMap isn't found

* update message

* reword error message again

istio/old_pilot_repo,vadimeisenbergibm/pilot,vadimeisenbergibm/pilot,kyessenov/pilot,istio/old_pilot_repo,kyessenov/pilot,vadimeisenbergibm/pilot,kyessenov/pilot,istio/old_pilot_repo,kyessenov/pilot