Add better persistent flags testing
Add better persistent flags testing

jlowdermilk/cobra,akutz/cobra,bep/cobra,anthonyfok/cobra,jrossi/cobra,k4rtik/cobra,ghodss/cobra,sdomino/cobra,abhishekgahlot/cobra,vikstrous/cobra,fabianofranz/cobra,spf13/cobra,simlelievre/cobra,eparis/cobra,liggitt/cobra,gosuri/cobra,nicrioux/cobra