add long help text and example usage to kube-inject command (#393)
add long help text and example usage to kube-inject command (#393)


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