envns should be availabe in message line (#734)
envns should be availabe in message line (#734)

This line warns the user that dependent environment doesn’t exist, and presents the command line
for creating an environment.

When the variable `envNamespace` is specified, the `envns` option should be available as well.

fission/fission,fission/fission,life1347/fission,platform9/fission,life1347/fission,fission/fission,life1347/fission,life1347/fission,life1347/fission,fission/fission,life1347/fission,life1347/fission,life1347/fission,platform9/fission,platform9/fission,life1347/fission,platform9/fission