Fail fast if the Whirr CLI is running as root and show how whirr.cluster-user can be used to avoid any issues.
... unless whirr.cluster-user != root
With this patch whirr.cluster-user != root is mandatory - enforced by ClusterSpec.
This one is awaiting your review.
+1 (but please don't change import ordering).
Committed to trunk (without re-ordering the imports). Thanks Tom!
Committed to 0.7 branch.