FAFO Anti Salvation

I know there is a weak aura for this but all too often it seems to have its own issues. I have seen Tanks struggle with this from time to time. So I figured I would write a solution. This addon works more reliably than the weak aura available. 

You must be assigned the role of Tank for it to work properly. If your role is correct. It will remove Salvation as soon as it's been cast on you.