Remove unnecessary shortDescription in base test class.
Remove unnecessary shortDescription in base test class.

It was only required for nose, which we don't use anymore.

mozilla/socorro,lonnen/socorro,lonnen/socorro,Tayamarn/socorro,mozilla/socorro,mozilla/socorro,mozilla/socorro,Tayamarn/socorro,mozilla/socorro,Tayamarn/socorro,lonnen/socorro,Tayamarn/socorro,Tayamarn/socorro,lonnen/socorro,mozilla/socorro,Tayamarn/socorro