Expose kube-api burst/qps settings for kube components

Default to hardcodes for components that had them, and 5.0 qps, 10 burst
for those that relied on client defaults

Unclear if maybe it'd be better to just assume these are set as part of
the incoming kubeconfig.  For now just exposing them as flags since it's
easier for me to manually tweak.

hack/verify-flags/known-flags.txt

@@ -129,6 +129,8 @@ ir-user
 jenkins-host
 jenkins-jobs
 km-path
+kube-api-burst
+kube-api-qps
 kubectl-path
 kubelet-cadvisor-port
 kubelet-certificate-authority