Reverted the name to username, so that Hudson Team authorization works.

It appears that the Hudson team authorization strategy in 3.1.0 uses the name field to check if a user is a sysadmin. By changing the name to full from user, you cannot make any user a sysadmin. This simple fix takes care of the issue. I don't see this as a complete fix, since it does not provide the option to display the full name, but I thought you should  at least know this is an issue.