// Validate that policies associated with roles are defined. If
	// authZ plugin is set, role policies are just claims sent to
	// the plugin and they need not exist.
	//
	// If some mapped policies do not exist, we print some error
	// messages but continue any way - they can be fixed in the
	// running server by creating the policies after start up.
	for arn, rolePolicies := range m {