Need to check if a WikiName is not already in use when creating new accounts

[Guilherme Salgado]

When we create a new account we automatically create a WikiName for that account, so that account can be used to log on the Ubuntu wiki. The problem (as one can see in OOPS-67C37) is that we don't check if a WikiName is not already in use before trying to insert it in the database.

[Guilherme Salgado (salgado)]

I was completely wrong. We do check if a WikiName is not already in use and the problem on that OOPS is something for which we already have a bug filed.