Adding credentials to multiple workflows after enabling Kerberos

If I have thousands of running workflows in a cluster(unsecured) and I configure Kerberos authentication, I will have to edit each workflow to add a credential section which can be difficult and time consuming. Is there any option to avoid manual edit? If not, can we add a feature using which we can configure credentials at one place (maybe in Oozie configs) and can be referred by respective action in the workflow? 

I know it can be complex to do this however just wanted to check if there is any better way or this can be considered as a feature request.