Ensure all secrets are encrypted when at REST

[jtmulvey]

By default K8s secrets are NOT encrypted at REST (when stored by etcd). Any use of secrets by Kabanero should ensure encryption is enabled. See 👍 https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/

[seabaylea]

Note that this only encrypts the data at rest in etcd - once injected into a container as an environment variable, that env var is not encrypted.

[jtmulvey]

Correct Chris. We also will need a more holistic solution that encompasses how secrets are stored inside a container instance.