
So that a user can manage the nodepool config file (which is a secret) outside of helm, add an option where the user can specify the name of that secret as a value, and if it's set, helm will not write the secret and will tell k8s to mount that secret as the nodepool config instead. Change-Id: Ifa1b5e81b6c7700faef82f3b18aab157d042e735