[fix bug 1033306] Allow Mozillians to update their legacy vouch by re-vouching.

...uching.
Boy you should be more relaxed given that you're on PTO!  :D  What goes on in this patch is fixing something that's broken 

You're making a good point here. The original idea is to allow users to re-vouch others but then we decided to update the old vouch. Agreed that this db change is not needed anymore.