Move error about connecting to healthz server to V(1)
Merge pull request #1855 from mfojtik/verbose

Make Kubernetes startup less noisy
Re-read request body if provided arg is io.Reader

Fixes #1149 - kubecfg proxy "411 Length Required" error on POST/PUT.
Move proxy request body reading to ProxyServer.ServeHTTP.
Rebase onto master to re-run flaky tests