More tweaks to enable end to end deployment

Add ReplicationController test for py

fix(test): fix expandybird environment variables

More tweaks to enable end-to-end deployment

ref(scripts): update start-local.sh output

Fix unused struct and bad log output

When adding additional env to an Cmd you must use append

feat(cli) add kubectl path option

fix(manager): add test for delete deployment API

Deleting a deployment returns the deployment object. This adds an
unmarshal test on that.

ref(client): return cleaner errors

Tweaks to get end to end deployment working

WIP: Fourth round of refactoring for Manager