Allow users to set current environment

[schu]

Similar to kubectl config set-context ..., allow users to set a current environment. Only default to default if not set.

[robertgzr]

Should that also change the kubectl context to the new cluster?

[schu]

Personally as a user, I wouldn't want kube-spawn to change my kubectl context.

[schu]

Once https://github.com/kinvolk/kube-spawn/pull/265 is ready and merged, this can be done by setting cluster-name: my-default in the config.