Introduce server fields for Scalyr Agent
Introduce server fields for Scalyr Agent

This introduces the fields cluster_alias and cluster_environment to the Scalyr Agent.

Signed-off-by: Felix Mueller <4dc21f64111cc6819131c5268d1ec9d56a5fbb44@zalando.de>

zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws