2ac6d0a fix typo in start_task

Authored and Committed by Dan Callaghan 10 years ago
    fix typo in start_task
    
    This code path isn't normally used in Beaker recipes. Luckily pylint
    found this for me:
    
        beah/wires/internals/twtask.py:177: [E0602, start_task] Undefined variable 'factor'
    
    Time to find a brown paper bag, I suppose...
    
    Change-Id: I686cbe61f8d9194ddad93e32dd889711261e0880